dojo.require("dojo.widget.DebugConsole");
dojo.require("dojo.widget.DatePicker");
dojo.require("dojo.widget.Button");
dojo.require("dojo.widget.validate");
dojo.require("dojo.widget.Spinner");
dojo.require("dojo.lfx.html");
dojo.hostenv.writeIncludes();

var XFORMS_NS = "http://www.w3.org/2002/xforms";
var XFORMS_NS_PREFIX = "xforms";
var XHTML_NS = "http://www.w3.org/1999/xhtml";
var XHTML_NS_PREFIX = "xhtml";
var CHIBA_NS = "http://chiba.sourceforge.net/xforms";
var CHIBA_NS_PREFIX = "chiba";

function _xforms_init()
{
  document.xform = new alfresco.xforms.XForm();
}

dojo.addOnLoad(_xforms_init);

tinyMCE.init({
      theme: "advanced",
      mode: "exact",
      width: -1,
      auto_resize: false,
      force_p_newlines: false,
      encoding: null,
      save_callback: "document.xform.setXFormsValue",
      add_unload_trigger: false,
      add_form_submit_trigger: false,
      theme_advanced_toolbar_location: "top",
      theme_advanced_toolbar_align: "left",
      theme_advanced_buttons1: "bold,italic,underline,strikethrough,separator,fontselect,fontsizeselect",
      theme_advanced_buttons2: "link,unlink,image,separator,justifyleft,justifycenter,justifyright,justifyfull,separator,bulllist,numlist,separator,undo,redo,separator,forecolor,backcolor",
      theme_advanced_buttons3: ""
});

dojo.declare("alfresco.xforms.Widget",
	     null,
	     {
  	       initializer: function(xform, node) 
  	       {
		 this.xform = xform;
		 this.node = node;
//XXXareibl this has to come back
//		 this.node.widget = this;
		 this.id = this.node.getAttribute("id");
		 this.modified = false;
		 this.valid = true;
	       },
	       node: null,
	       parent: null,
	       domContainer: null,
	       _getBinding: function()
	       {
		 return this.xform.getBinding(this.node);
	       },
	       setModified: function(b)
               {
                 this.modified = b;
                 this._updateDisplay();
                 this.hideAlert();
               },
               setValid: function(b)
               {
                 this.valid = b;
                 this._updateDisplay();
                 this.hideAlert();
               },
               setRequired: function(b)
               {
                 this.required = b;
                 this._updateDisplay();
               },
               isValidForSubmit: function()
               {
                 var result = true;
                 if (!this.valid)
                   result = false;
                 else if (!this.modified && 
                          this.isRequired() && 
                          this.getInitialValue() == null)
                   result = false;
                 return result;
               },
               getDepth: function()
               {
                 var result = 1;
                 var p = this.parent;
                 while (p)
                 {
                   result++;
                   p = p.parent;
                 }
                 return result;
               },
      	       isRequired: function()
               {
                 var binding = this._getBinding();
                 var required = binding && binding.required == "true()";
                 return required;
               },
               getInitialValue: function()
               {
                 var chibaData = _getElementsByTagNameNS(this.node, 
  							 CHIBA_NS, 
	  						 CHIBA_NS_PREFIX, 
							 "data");
                 if (chibaData.length == 0)
                   return null;
                 
                 chibaData = chibaData[chibaData.length - 1];
                 var xpath = chibaData.getAttribute("chiba:xpath");
                 var d = this.node.ownerDocument;
                 var contextNode = this.xform.getInstance();
                 dojo.debug("locating " + xpath + 
                            " from " + chibaData.nodeName + 
                            " in " + contextNode.nodeName);
		 var result = _evaluateXPath("/" + xpath, 
					     this.xform.getInstance(), 
					     XPathResult.FIRST_ORDERED_NODE_TYPE);
		 result = (result.nodeType == dojo.dom.ELEMENT_NODE
			   ? dojo.dom.textContent(result)
			   : result.nodeValue);
		 dojo.debug("resolved xpath " + xpath + " to " + result);
		 return result;
               },
    	       _getLabelNode: function()
               {
                 var labels = _getElementsByTagNameNS(this.node, XFORMS_NS, XFORMS_NS_PREFIX, "label");
                 for (var i = 0; i < labels.length; i++)
                 {
                   dojo.debug("parent " + labels[i].parentNode.nodeName + 
                              " o " + this.node.nodeName);
                   if (labels[i].parentNode == this.node)
                     return labels[i];
                 }
                 return null;
               },
    	       _getAlertNode: function()
               {
                 var labels = this.node.getElementsByTagName("alert");
                 for (var i = 0; i < labels.length; i++)
                 {
                   dojo.debug("parent " + labels[i].parentNode.nodeName + 
                              " o " + this.node.nodeName);
                   if (labels[i].parentNode == this.node)
                     return labels[i];
                 }
                 return null;
               },
               getLabel: function()
               {
                 var node = this._getLabelNode();
                 return node ? dojo.dom.textContent(node) : "";
               },
               getAlert: function()
               {
                 var node = this._getAlertNode();
                 return node ? dojo.dom.textContent(node) : "";
               },
               showAlert: function()
               {
                 if (this.alertDiv)
                   return;
                 this.alertDiv = document.createElement("div");
                 this.alertDiv.setAttribute("id", this.id + "-alert");
                 this.alertDiv.appendChild(document.createTextNode(this.getAlert()));
                 this.domContainer.parentNode.insertBefore(this.alertDiv, this.domContainer);
                 this.alertDiv.setAttribute("style", "color:red; position: relative; top: 0px; left: 0px;");
                 this.widget.style.borderColor = "red";
               },
               hideAlert: function()
               {
                 if (this.alertDiv)
                 {
                   dojo.dom.removeNode(this.alertDiv);
                   this.alertDiv = null;
                   this.widget.style.borderColor = "black";
                 }
               },
               _updateDisplay: function()
               {
//                 this.domContainer.style.backgroundColor =  
//                   (!this.valid ? "yellow" : this.modified ? "lightgreen" : "white");
               }
	     });

dojo.declare("alfresco.xforms.DatePicker",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
	       render: function(attach_point)
	       {
	         var initial_value = this.getInitialValue() || "";
               
	         this.domNode = document.createElement("div");
	         attach_point.appendChild(this.domNode);
                 this.widget = document.createElement("input");
                 this.widget.setAttribute("id", this.id + "-widget");
                 this.widget.setAttribute("type", "text");
                 this.widget.setAttribute("value", initial_value);
                 this.domNode.appendChild(this.widget);
	         dojo.event.connect(this.widget, "onfocus", this, this._dateTextBox_focusHandler);
               
	         var datePickerDiv = document.createElement("div");
	         attach_point.appendChild(datePickerDiv);
               
	         var dp_initial_value = (initial_value
	          		       ? initial_value
	          		       : dojo.widget.DatePicker.util.toRfcDate(new Date()));
	         this.widget.picker = dojo.widget.createWidget("DatePicker", 
                                                               { 
                                                                 isHidden: true, 
                                                                 storedDate: dp_initial_value
                                                               }, 
                                                               datePickerDiv);
	         this.widget.picker.hide();
	         dojo.event.connect(this.widget.picker,
	          		  "onSetDate", 
	          		  this,
	          		  this._datePicker_setDateHandler);
	       },
	       getValue: function()
	       {
	         return this.widget.value;
	       },
	       _dateTextBox_focusHandler: function(event)
               {
                 dojo.style.hide(this.widget);
                 this.widget.picker.show();
                 this.domContainer.style.height = 
                   this.widget.picker.domNode.offsetHeight + "px";
               },
	       _datePicker_setDateHandler: function(event)
	       {
	         this.widget.picker.hide();
	         dojo.style.show(this.widget);
	         this.domContainer.style.height = 
	           Math.max(this.widget.offsetHeight, 20) + "px";
	         this.widget.value = dojo.widget.DatePicker.util.toRfcDate(this.widget.picker.date);
	         this.xform.setXFormsValue(this.id, this.getValue());
	       }
	     });

dojo.declare("alfresco.xforms.TextField",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
               isValidForSubmit: function()
               {
                 var result = this.inherited("isValidForSubmit", []);
                 if (!result)
                   return false;
                 if (this.isRequired() && this.getValue() == null)
                   return false;
                 return true;
               },
	       render: function(attach_point)
               {
	         var initial_value = this.getInitialValue() || "";
	         this.domNode = document.createElement("div");
	         this.domNode.setAttribute("id", this.id + "-domNode");
	         attach_point.appendChild(this.domNode);
               
                 this.widget = document.createElement("input");
                 this.widget.setAttribute("type", "text");
                 this.widget.setAttribute("id", this.id + "-widget");
                 this.widget.setAttribute("value", initial_value);
                 this.domNode.appendChild(this.widget);
//	         this.widget = dojo.widget.createWidget("ValidationTextBox", 
//	          				      {
//	          				        widgetId: this.id + "-widget",
//	          				        required: this.isRequired(), 
//	          					value: initial_value 
//	          				      }, 
//	          				      this.domNode);
	         dojo.event.connect(this.widget, "onkeyup", this, this._widget_keyUpHandler);
	       },
	       getValue: function()
	       {
	         var result = this.widget.value;
                 if (result != null && result.length == 0)
                   result = null;
                 return result;
	       },
	       _widget_keyUpHandler: function(event)
	       {
	         this.xform.setXFormsValue(this.id, this.getValue());
	       }
	     });

dojo.declare("alfresco.xforms.TextArea",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
	       render: function(attach_point)
	       {
	         this.domNode = document.createElement("div");
	         attach_point.appendChild(this.domNode);
	         this.domNode.setAttribute("style", "height: 200px; border: solid 1px black;");
	         this.domNode.setAttribute("id", this.id);
	         this.domNode.innerHTML = this.getInitialValue() || "";
	         tinyMCE.addMCEControl(this.domNode, this.id);
                 this.widget = this.domNode;
	       }
	     });

dojo.declare("alfresco.xforms.AbstractSelectWidget",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
	       getValues: function()
	       {
	         var binding = this._getBinding();
	         var values = _getElementsByTagNameNS(this.node, XFORMS_NS, XFORMS_NS_PREFIX, "item");
	         var result = [];
	         for (var v = 0; v < values.length; v++)
	         {
		   var label = _getElementsByTagNameNS(values[v], XFORMS_NS, XFORMS_NS_PREFIX, "label")[0];
		   var value = _getElementsByTagNameNS(values[v], XFORMS_NS, XFORMS_NS_PREFIX, "value")[0];
		   var valid = true;
		   if (binding.constraint)
		   {
		     dojo.debug("testing " + binding.constraint + 
				" on " + dojo.dom.textContent(value));
		     valid = _evaluateXPath(binding.constraint, value, XPathResult.BOOLEAN_TYPE);
		   }
		   dojo.debug("valid " + dojo.dom.textContent(value) + "? " + valid);
		   if (valid)
		   {
		     result.push({ 
		       id: value.getAttribute("id"), 
		       label: dojo.dom.textContent(label),
		       value: dojo.dom.textContent(value)
		     });
		   }
	         }
	         return result;
	       }
	     });

dojo.declare("alfresco.xforms.Select",
	     alfresco.xforms.AbstractSelectWidget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
	       render: function(attach_point)
               {
	         var values = this.getValues();
	         for (var i in values)
	         {
	       	 dojo.debug("values["+ i + "] = " + values[i].id + 
	       		    ", " + values[i].label + ", " + values[i].value);
	         }
	         var initial_value = this.getInitialValue();
	         if (values.length <= 5)
	         {
	       	 for (var i in values)
	       	 {
                     this.widget = document.createElement("span");
                     attach_point.appendChild(this.widget);
	       	   var checkbox = document.createElement("input");
	       	   checkbox.setAttribute("id", this.id + "_" + i + "-widget");
	       	   checkbox.setAttribute("name", this.id + "_" + i + "-widget");
	       	   checkbox.setAttribute("type", "checkbox");
	       	   checkbox.setAttribute("value", values[i].value);
	       	   if (values[i].value == initial_value)
	       	     checkbox.setAttribute("checked", "true");
	       	   dojo.event.connect(checkbox, "onclick", this, this._checkbox_clickHandler);
	       	   this.widget.appendChild(checkbox);
	       	   this.widget.appendChild(document.createTextNode(values[i].label));
	       	 }
	         }
	         else
	         {
	       	 initial_value = initial_value ? initial_value.split(' ') : [];
	       	 this.widget = document.createElement("select");
	       	 this.widget.setAttribute("id", this.id + "-widget");
	       	 this.widget.setAttribute("multiple", true);
	       	 attach_point.appendChild(this.widget);
	       	 for (var i in values)
	       	 {
	       	   var option = document.createElement("option");
	       	   option.appendChild(document.createTextNode(values[i].label));
	       	   option.setAttribute("value", values[i].value);
	       	   if (initial_value.indexOf(values[i].value) != -1)
	       	     option.setAttribute("selected", "true");
	       	   this.widget.appendChild(option);
	       	 }
	       	 dojo.event.connect(this.widget, "onchange", this, this._list_changeHandler);
	         }
	       },
               _list_changeHandler: function(event) 
	       { 
	       	 var selected = [];
	       	 for (var i = 0; i < event.target.options.length; i++)
	       	 {
	       	   if (event.target.options[i].selected)
	       	     selected.push(event.target.options[i].value);
	       	 }
	       	 this.xform.setXFormsValue(this.id, selected.join(" "));
	       },
	       _checkbox_clickHandler: function(event)
	       { 
	         var selected = [];
	         for (var i = 0; i < 5; i++)
	         {
	       	 var checkbox = document.getElementById(this.id + "_" + i + "-widget");
	       	 if (checkbox && checkbox.checked)
	       	   selected.push(checkbox.value);
	         }
	         this.xform.setXFormsValue(this.id, selected.join(" "));
	       }
	     });

dojo.declare("alfresco.xforms.Select1",
	     alfresco.xforms.AbstractSelectWidget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
	       render: function(attach_point)
               {
	         var values = this.getValues();
	         for (var i in values)
	         {
	       	 dojo.debug("values["+ i + "] = " + values[i].id + 
	       		    ", " + values[i].label + ", " + values[i].value);
	         }
	         var initial_value = this.getInitialValue();
	         if (values.length <= 5)
	         {
	       	 for (var i in values)
	       	 {
                     this.widget = document.createElement("span");
                     this.widget.style.width = "100%";
                     attach_point.appendChild(this.widget);
	       	   var radio = document.createElement("input");
	       	   radio.setAttribute("id", this.id + "-widget");
	       	   radio.setAttribute("name", this.id + "-widget");
	       	   radio.setAttribute("type", "radio");
	       	   radio.setAttribute("value", values[i].value);
	       	   if (values[i].value == initial_value)
	       	     radio.setAttribute("checked", "true");
	       	   dojo.event.connect(radio, "onclick", this, this._radio_clickHandler);
	       	   this.widget.appendChild(radio);
	       	   this.widget.appendChild(document.createTextNode(values[i].label));
	       	 }
	         }
	         else
	         {
                   this.widget = document.createElement("select");
	       	 this.widget.setAttribute("id", this.id + "-widget");
	       	 attach_point.appendChild(this.widget);
	       	 for (var i in values)
	       	 {
	       	   var option = document.createElement("option");
	       	   option.appendChild(document.createTextNode(values[i].label));
	       	   option.setAttribute("value", values[i].value);
	       	   if (values[i].value == initial_value)
	       	     option.setAttribute("selected", "true");
	       	   this.widget.appendChild(option);
	       	 }
	       	 dojo.event.connect(this.widget, "onchange", this, this._combobox_changeHandler);
	         }
	       },
               _combobox_changeHandler: function(event) 
	       { 
	         this.xform.setXFormsValue(this.id,
	       				 event.target.options[event.target.selectedIndex].value);
	       },
	       _radio_clickHandler: function(event)
	       { 
	         this.xform.setXFormsValue(this.id,
	       				 event.target.value);
	       }
	     });

dojo.declare("alfresco.xforms.Checkbox",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	       },
	       render: function(attach_point)
	       {
	         var initial_value = this.getInitialValue() == "true";
	         this.widget = document.createElement("input");
	         this.widget.setAttribute("type", "checkbox");
	         this.widget.setAttribute("id", this.id + "-widget");
	         if (initial_value)
	       	 this.widget.setAttribute("checked", true);
	         attach_point.appendChild(this.widget);
	         dojo.event.connect(this.widget, "onclick", this, this._checkbox_clickHandler);
	       },
               _checkbox_clickHandler: function(event)
	       {
	         this.xform.setXFormsValue(this.id, this.widget.checked);
	       }
	     });

dojo.declare("alfresco.xforms.Group",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
	         this.children = [];
	       },
	       children: null,
               getWidgetsInvalidForSubmit: function()
	       {
	         var result = [];
	         for (var i = 0; i < this.children.length; i++)
	         {
                   if (this.children[i] instanceof alfresco.xforms.Group)
                     result = result.concat(this.children[i].getWidgetsInvalidForSubmit());
                   else if (!this.children[i].isValidForSubmit())
                     result.push(this.children[i]);
	         }
	         return result;
	       },
	       getChildAt: function(index)
	       {		 
	         return index < this.children.length ? this.children[index] : null;
	       },
	       getChildIndex: function(child)
	       {
	         for (var i = 0; i < this.children.length; i++)
	         {
	       	 dojo.debug(this.id + "[" + i + "]: " + 
	       		    " is " + this.children[i].id + " the same as " + child.id + "?");
	       	 if (this.children[i] == child)
	       	   return i;
	         }
	         return -1;
	       },
               domNode: null,
	       addChild: function(child)
	       {
	         return this.insertChildAt(child, this.children.length);
	       },
               insertChildAt: function(child, position)
	       {
	         dojo.debug(this.id + ".insertChildAt(" + child.id + ", " + position + ")");
	         child.parent = this;
	       
	         child.domContainer = document.createElement("div");
		 child.domContainer.setAttribute("id", child.id + "-domContainer");
	         child.domContainer.setAttribute("style", "border: 0px solid green; margin-top: 2px; margin-bottom: 2px;");
		 child.domContainer.style.position = "relative";
		 child.domContainer.style.left = "0px";
		 child.domContainer.style.top = "0px";
	         child.domContainer.style.width = "100%";
	         if (this.parent && this.parent.domNode)
		   child.domContainer.style.top = this.parent.domNode.style.bottom;
	       
	         if (position == this.children.length)
	         {
		   this.domNode.appendChild(child.domContainer);
		   this.children.push(child);
	         }
	         else
	         {
		   this.domNode.insertBefore(child.domContainer, 
					     this.getChildAt(position).domContainer);
		   this.children.splice(position, 0, child);
	         }
	       
	         if (!(child instanceof alfresco.xforms.Group))
	         {
		   var requiredImage = document.createElement("img");
		   requiredImage.setAttribute("src", WEBAPP_CONTEXT + "/images/icons/required_field.gif");
		   requiredImage.setAttribute("style", "margin: 0px 5px 0px 5px;");
		   child.domContainer.appendChild(requiredImage);
	       	 
		   if (!child.isRequired())
		     requiredImage.style.visibility = "hidden";
		   var label = child._getLabelNode();
		   if (label)
		   {
		     var labelNode = document.createTextNode(dojo.dom.textContent(label));
		     child.domContainer.appendChild(labelNode);
		   }
	         }
	         var contentDiv = document.createElement("div");
	         contentDiv.setAttribute("id", child.id + "-content");
	         child.domContainer.appendChild(contentDiv);
	         contentDiv.style.position = "relative";
	         contentDiv.style.left = (child instanceof alfresco.xforms.Group 
	       				? "0px" 
	       				: "30%");
	         if (!(child instanceof alfresco.xforms.Group))
	         {
		   contentDiv.style.width = (child.domContainer.offsetWidth * .55) + "px";
		   //		 contentDiv.style.width = ((child.domContainer.offsetWidth - contentDiv.offsetLeft) - 10) + "px";
	         }
	         child.render(contentDiv);
	         if (!(child instanceof alfresco.xforms.Group))
	         {
		   child.domContainer.style.height = Math.max(contentDiv.offsetHeight, 20) + "px";
		   child.domContainer.style.lineHeight = child.domContainer.style.height;
	         }

		 dojo.debug(contentDiv.getAttribute("id") + " offsetTop is " + contentDiv.offsetTop);
	         contentDiv.style.top = "-" + contentDiv.offsetTop + "px";
	         contentDiv.widget = child;
	       
	         this._updateDisplay();
	         return child.domContainer;
	       },
	       removeChildAt: function(position)
	       {
	         var child = this.getChildAt(position);
	         if (!child)
                   throw new Error("unabled to find child at " + position);
	         this.children.splice(position, 1);
	         child.domContainer.group = this;
	         var anim = dojo.lfx.html.fadeOut(child.domContainer, 500);
	         anim.onEnd = function()
                   {
                     child.domContainer.style.display = "none";
                     dojo.dom.removeChildren(child.domContainer);
                     dojo.dom.removeNode(child.domContainer);
                     child.domContainer.group._updateDisplay();
                   };
	         anim.play();
	       },
	       isIndented: function()
               {
	       	 return false && this.parent != null;
               },
	       render: function(attach_point)
               {
	       	 this.domNode = document.createElement("div");
	       	 this.domNode.setAttribute("id", this.id + "-domNode");
	       	 this.domNode.widget = this;
	       	 attach_point.appendChild(this.domNode);
	       
	       	 this.domNode.setAttribute("style", "border: 0px solid blue;");
		 this.domNode.style.position = "relative";
		 this.domNode.style.top = "0px";
		 this.domNode.style.left = "0px";
	       	 this.domNode.style.width = "100%";
	       	 if (this.isIndented())
	       	   this.domNode.style.marginLeft = "10px";
	       	 return this.domNode;
               },
	       _updateDisplay: function()
	       {
	         for (var i = 0; i < this.children.length; i++)
	         {
                   this.children[i]._updateDisplay();
	         }
	       }
	     });

dojo.declare("alfresco.xforms.Repeat",
	     alfresco.xforms.Group,
	     {
	       initializer: function(xform, node) 
               {
	         this.inherited("initializer", [ xform, node ]);
	       },
               _selectedIndex: -1,
               insertChildAt: function(child, position)
	       {
	         var result = this.inherited("insertChildAt", [ child, position ]);
	         child.repeat = this;
               
	         dojo.event.connect(result, "onclick", function(event)
	          		    {
	          		      child.repeat.setFocusedChild(child);
                                    });
	         
	         var controls = document.createElement("div");
	         result.appendChild(controls);
	         controls.style.position = "absolute";
	         controls.style.right = "5px";
	         controls.style.bottom = "0px";
               
	         var images = [ 
	           { src: "plus", action: this._insertRepeatItemAfter_handler },
	           { src: "arrow_up", action: this._moveRepeatItemUp_handler },
	           { src: "arrow_down", action: this._moveRepeatItemDown_handler }, 
	           { src: "minus", action: this._removeRepeatItem_handler }
	         ];
	         for (var i in images)
	         {
	           var img = document.createElement("img");
	           img.setAttribute("src", (WEBAPP_CONTEXT + "/images/icons/" + 
                                            images[i].src + ".gif"));
	           img.style.width = "16px";
	           img.style.height = "16px";
	           img.style.marginRight = "4px";
	           img.repeatItem = child;
	           img.repeat = this;
	           controls.appendChild(img);
	           dojo.event.connect(img, "onclick", this, images[i].action);
	         }
               
	         return result;
	       },
	       getSelectedIndex: function()
	       {
	         this._selectedIndex = Math.min(this.children.length - 1, this._selectedIndex);
	         if (this.children.length == 0)
	           this._selectedIndex = -1;
	         return this._selectedIndex;
	       },
	       _updateDisplay: function()
	       {
	         this.inherited("_updateDisplay", []);
	         for (var i = 0; i < this.children.length; i++)
	         {
	           this.children[i].domContainer.style.backgroundColor = 
	             i % 2 ? "#f0f0ee" : "#ffffff"; 
	         }
	       },
	       _insertRepeatItemAfter_handler: function(event)
	       {
	         dojo.event.browser.stopEvent(event);
	         this.setFocusedChild(event.target.repeatItem);
	         if (!this.insertRepeatItemAfterTrigger)
	           this.insertRepeatItemAfterTrigger = 
	             _findElementById(this.node.parentNode, this.id + "-insert_after");
	         this.xform.fireAction(this.insertRepeatItemAfterTrigger.getAttribute("id"));
	       },
	       _insertRepeatItemBefore_handler: function(event)
	       {
	         dojo.event.browser.stopEvent(event);
	         this.setFocusedChild(event.target.repeatItem);
	         if (!this.insertRepeatItemBeforeTrigger)
	           this.insertRepeatItemBeforeTrigger = 
	             _findElementById(this.node.parentNode, this.id + "-insert_before");
	         this.xform.fireAction(this.insertRepeatItemBeforeTrigger.getAttribute("id"));
	       },
	       _removeRepeatItem_handler: function(event)
	       {
	         dojo.event.browser.stopEvent(event);
	         this.setFocusedChild(event.target.repeatItem);
	         if (!this.removeRepeatItemTrigger)
	           this.removeRepeatItemTrigger = _findElementById(this.node.parentNode, 
                                                                   this.id + "-delete");
	         this.xform.fireAction(this.removeRepeatItemTrigger.getAttribute("id"));
	       },
	       _moveRepeatItemUp_handler: function(event)
	       {
	         dojo.event.browser.stopEvent(event);
	         var r = event.target.repeat;
	         var index = r.getChildIndex(event.target.repeatItem);
	         if (index == 0 || r.children.length == 1)
	           return;
	         event.target.repeat.swapChildren(index, index - 1);
	       },
	       _moveRepeatItemDown_handler: function(event)
	       {
	         dojo.event.browser.stopEvent(event);
	         var r = event.target.repeat;
	         var index = r.getChildIndex(event.target.repeatItem);
	         if (index == r.children.length - 1 || r.children.length == 1)
	           return;
	         event.target.repeat.swapChildren(index, index + 1);
	       },
	       swapChildren: function(fromIndex, toIndex)
	       {
	         dojo.debug(this.id + ".swapChildren(" + fromIndex + 
	          	  ", " + toIndex + ")");
	         var fromChild = this.getChildAt(fromIndex);
	         var toChild = this.getChildAt(toIndex);
//	         var toChildCoords = dojo.style.getAbsolutePosition(toChild.domContainer);
//	         toChildCoords = [ toChildCoords.x, toChildCoords.y ];
//	         alert("to coords [ " + toChildCoords[0] + ", " + toChildCoords[0] + "]");
//	         var fromChildCoords = dojo.style.getAbsolutePosition(fromChild.domContainer);
//	         fromChildCoords = [ fromChildCoords.x, fromChildCoords.y ];
//	         alert("from coords [ " + fromChildCoords[0] + ", " + fromChildCoords[0] + "]");
//	         dojo.lfx.html.slideTo(fromChild.domContainer, 5000, toChildCoords);
//	         dojo.lfx.html.slideTo(toChild.domContainer, 5000, fromChildCoords);
               
               
	         var swapNode = document.createElement("div");
//	         dojo.dom.removeNode(toChild.domContainer);
//	         dojo.dom.removeNode(fromChild.domContainer);
	         this.domNode.replaceChild(swapNode, fromChild.domContainer);
	         this.domNode.replaceChild(fromChild.domContainer, toChild.domContainer);
	         this.domNode.replaceChild(toChild.domContainer, swapNode);
               
	         this.children[fromIndex] = toChild;
	         this.children[toIndex] = fromChild;
	         this._selectedIndex = toIndex;
	         this._updateDisplay();
	       },
	       setFocusedChild: function(child)
	       {
	         if (!child)
	           this.xform.setRepeatIndex(this.id, 0);
	         else
	         {
	           var index = this.getChildIndex(child);
	           if (index < 0)
	             throw new Error("unable to find child " + child.id + " in " + this.id);
               
	           // chiba thinks indexes are initialized to 1 so just
	           // highlight the thing
	           if (this.getSelectedIndex() == -1 && index == 0)
	             this.handleIndexChanged(0);
	           else
	             // xforms repeat indexes are 1-based
	             this.xform.setRepeatIndex(this.id, index + 1);
	         }
	       },
	       isIndented: function()
	       {
	         return false;
	       },
	       render: function(attach_point)
	       {
	         this.domNode = this.inherited("render", [ attach_point ]);
	         this.domNode.style.borderColor = "black";
	         this.domNode.style.borderWidth = "1px";
	         
	         var d = document.createElement("div");
	         d.repeat = this;
	         this.domNode.appendChild(d);
		 d.style.position = "relative";
		 d.style.top = "0px";
		 d.style.left = "0px";
		 d.style.height = "20px";
		 d.style.lineHeight = "20px";
		 d.style.backgroundColor = "#cddbe8";
		 d.style.fontWeight = "bold";
	         d.style.width = "100%";
	         dojo.event.connect(d, "onclick", function(event)
				    {
				      if (event.target == event.currentTarget)
                                        event.currentTarget.repeat.setFocusedChild(null);
				    });
               
	         //used only for positioning the label accurately
	         var requiredImage = document.createElement("img");
	         requiredImage.setAttribute("src", WEBAPP_CONTEXT + "/images/icons/required_field.gif");
	         requiredImage.setAttribute("style", "margin: 0px 5px 0px 5px;");
	         d.appendChild(requiredImage);
//	         requiredImage.style.position = "relative";
//	         requiredImage.style.top = "0px";
//	         requiredImage.style.left = "0px";
	         requiredImage.style.visibility = "hidden";
               
	         var labelElement = document.createTextNode(this.parent.getLabel());//document.createElement("span");
	         d.appendChild(labelElement);
	         
	         var addElement = document.createElement("img");
	         d.appendChild(addElement);
	         addElement.setAttribute("src", WEBAPP_CONTEXT + "/images/icons/plus.gif");
	         addElement.style.width = "16px";
	         addElement.style.height = "16px";
	         addElement.style.position = "absolute";
	         addElement.style.top = "0px";
	         addElement.style.right = 5 + (16 * 4) + "px";
	         
	         dojo.event.connect(addElement, "onclick", this, this._insertRepeatItemBefore_handler);
	         
	         return this.domNode;
	       },
	       handleIndexChanged: function(index)
	       {
	         dojo.debug(this.id + ".handleIndexChanged(" + index + ")");
	         this._selectedIndex = index;
	         this._updateDisplay();
	       },
	       handlePrototypeCloned: function(prototypeId)
	       {
	         dojo.debug(this.id + ".handlePrototypeCloned("+ prototypeId +")");
	         var chibaData = _getElementsByTagNameNS(this.node, CHIBA_NS, CHIBA_NS_PREFIX, "data");
	         chibaData = chibaData[chibaData.length - 1];
	         dojo.debug("chiba:data == " + dojo.dom.innerXML(chibaData));
	         var prototypeToClone = dojo.dom.firstElement(chibaData);
	         if (prototypeToClone.getAttribute("id") != prototypeId)
	           throw new Error("unable to locate " + prototypeId +
	          		 " in " + this.id);
	         return prototypeToClone.cloneNode(true);
	       },
	       handleItemInserted: function(clonedPrototype, position)
	       {
	         dojo.debug(this.id + ".handleItemInserted(" + clonedPrototype.nodeName +
	          	  ", " + position + ")");
	         var w = this.xform.createWidget(clonedPrototype);
	         this.insertChildAt(w, position);
	         this.xform.loadWidgets(w.node, w);
	       },
	       handleItemDeleted: function(position)
	       {
	         dojo.debug(this.id + ".handleItemDeleted(" + position + ")");
	         this.removeChildAt(position);
	       }
	     });

dojo.declare("alfresco.xforms.Trigger",
	     alfresco.xforms.Widget,
	     {
	       initializer: function(xform, node) 
               {
	         this.inherited("initializer", [ xform, node ]);
               },
	       render: function(attach_point)
               {
	         var nodeRef = document.createElement("div");
	         attach_point.appendChild(nodeRef);
	         this.widget = dojo.widget.createWidget("Button", 
	          				      {
	          				      widgetId: this.id + "-widget",
	          				      caption: this.getLabel() + " " + this.id
	          				      }, 
	          				      nodeRef);
	         dojo.event.connect(this.widget, "onClick", this, this._clickHandler);
	         this.domContainer.style.display = "none";
	       },
	       _clickHandler: function(event)
	       {
	         this.xform.fireAction(this.id);
	       }
	     });

dojo.declare("alfresco.xforms.Submit",
	     alfresco.xforms.Trigger,
	     {
	       initializer: function(xform, node) 
	       {
	         this.inherited("initializer", [ xform, node ]);
		 var submit_buttons = _xforms_getSubmitButtons();
		 for (var i = 0; i < submit_buttons.length; i++)
		 {
		   dojo.debug("adding submit handler for " + submit_buttons[i].getAttribute('id'));
		   submit_buttons[i].xform = this.xform;
		   dojo.event.browser.addListener(submit_buttons[i], "onclick", function(event)
                   {
		     var xform = event.target.xform;
		     if (!xform.submitWidget.done)
		     {
		       dojo.debug("triggering submit from handler " + event.target.id);
		       dojo.event.browser.stopEvent(event);
		       tinyMCE.triggerSave();
		       _hide_errors();
		       xform.submitWidget.currentButton = event.target;
		       xform.submitWidget.widget.buttonClick(); 
		       return false;
		     }
		     else
		     {
		       dojo.debug("done - doing base click on " + xform.submitWidget.currentButton.id);
		       xform.submitWidget.currentButton = null;
		       return true;
		     }
		   });
		 }
	       },
	       render: function(attach_point)
	       {
	         this.inherited("render", [ attach_point ]);
	         this.xform.submitWidget = this;
	       },
	       _clickHandler: function(event)
	       {
	         this.done = false;
	         this.xform.fireAction(this.id);
	       }
	     });

dojo.declare("alfresco.xforms.XFormsEvent",
	     null,
	     {
	       initializer: function(node)
               {
	         this.type = node.nodeName;
	         this.targetId = node.getAttribute("targetId");
	         this.targetName = node.getAttribute("targetName");
	         this.properties = {};
	         for (var i = 0; i < node.childNodes.length; i++)
	         {
	           if (node.childNodes[i].nodeType == dojo.dom.ELEMENT_NODE)
	             this.properties[node.childNodes[i].getAttribute("name")] =
	               node.childNodes[i].getAttribute("value");
	         }
	       },
	       getTarget: function()
	       {
	         var targetDomNode = document.getElementById(this.targetId + "-content");
	         if (!targetDomNode)
	           throw new Error("unable to find node " + this.targetId + "-content");
	         return targetDomNode.widget;
	       }
	     });

dojo.declare("alfresco.xforms.XForm",
	     null,
	     {
	       initializer: function()
               {
	         send_ajax_request(create_ajax_request(this,
						       "getXForm",
						       {},
						       function(type, data, evt) 
						       {
							 this.xform._loadHandler(data);
						       }));
	       },
	       _loadHandler: function(xformDocument)
	       {
	         this.xformDocument = xformDocument;
	         this.node = xformDocument.documentElement;
	         this._bindings = this._loadBindings(this.getModel());
               
	         var bindings = this.getBindings();
	         for (var i in bindings)
	         {
	           dojo.debug("bindings[" + i + "]=" + bindings[i].id + 
	          	    ", parent = " + (bindings[i].parent 
	          			     ? bindings[i].parent.id
	          			     : 'null'));
	         }
	         var alfUI = document.getElementById("alf-ui");
	         alfUI.style.width = "100%";
	         this.rootWidget = new alfresco.xforms.Group(this, alfUI);
	         this.rootWidget.render(alfUI);
	         this.loadWidgets(this.getBody(), this.rootWidget);
	         this.rootWidget._updateDisplay();
	       },
               createWidget: function(node)
               {
		 dojo.debug("creating node for " + node.nodeName.toLowerCase());
	         switch (node.nodeName.toLowerCase())
	         {
	         case "xforms:group":
		   return new alfresco.xforms.Group(this, node);
	         case "xforms:repeat":
	           return new alfresco.xforms.Repeat(this, node);
	         case "xforms:textarea":
	           return new alfresco.xforms.TextArea(this, node);
	         case "xforms:input":
	           var type = this.getType(node);
	           switch (type)
	           {
	           case "date":
	             return new alfresco.xforms.DatePicker(this, node);
	           case "byte":
	           case "double":
	           case "float":
	           case "int":
	           case "integer":
	           case "long":
	           case "negativeInteger":
	           case "nonNegativeInteger":
	           case "nonPositiveInteger":
	           case "short":
	           case "unsignedByte":
	           case "unsignedInt":
	           case "unsignedLong":
	           case "unsignedShort":
	           case "positiveInteger":
	           case "string":
	           default:
	             return new alfresco.xforms.TextField(this, node);
	           }
	         case "xforms:select":
	           return new alfresco.xforms.Select(this, node);
	         case "xforms:select1":
	           return (this.getType(node) == "boolean"
	          	 ? new alfresco.xforms.Checkbox(this, node)
	          	 : new alfresco.xforms.Select1(this, node));
	         case "xforms:submit":
	           return new alfresco.xforms.Submit(this, node);
	         case "xforms:trigger":
	           return new alfresco.xforms.Trigger(this, node);
	         case "chiba:data":
	         case "xforms:label":
	         case "xforms:alert":
	           return null;
	         default:
	           throw new Error("unknown type " + node.nodeName);
	         }
	       },
	       loadWidgets: function(modelNode, parentWidget)
               {
                 for (var i = 0; i < modelNode.childNodes.length; i++)
                 {
                   if (modelNode.childNodes[i].nodeType == dojo.dom.ELEMENT_NODE)
                   {
                     dojo.debug("loading " + modelNode.childNodes[i] + 
				" nodeName " + modelNode.childNodes[i].nodeName + 
				" into " + parentWidget.id);
                     var w = this.createWidget(modelNode.childNodes[i]);
                     if (w != null)
	             {
		       dojo.debug("created " + w.id + " for " + modelNode.childNodes[i].nodeName);
	               parentWidget.addChild(w);
	               if (w instanceof alfresco.xforms.Group)
	                 this.loadWidgets(modelNode.childNodes[i], w);
                     }
                   }
                 }
               },
	       getModel: function()
	       {
	         return _getElementsByTagNameNS(this.node, 
						XFORMS_NS, 
						XFORMS_NS_PREFIX, 
						"model")[0];
	       },
	       getInstance: function()
	       {
	         var model = this.getModel();
	         return _getElementsByTagNameNS(model,
						XFORMS_NS,
						XFORMS_NS_PREFIX,
						"instance")[0];
	       },
	       getBody: function()
	       {
	         var b = _getElementsByTagNameNS(this.node,
						 XHTML_NS,
						 XHTML_NS_PREFIX,
						 "body");
	         return b[b.length - 1];
	       },
	       getType: function(node)
	       {
	         return this.getBinding(node).type;
	       },
	       getBinding: function(node)
	       {
	         return this._bindings[node.getAttribute("xforms:bind")];
	       },
	       getBindings: function()
	       {
	         return this._bindings;
	       },
	       _loadBindings: function(bind, parent, result)
	       {
	         result = result || [];
	         dojo.debug("loading bindings for " + bind.nodeName);
	         for (var i = 0; i < bind.childNodes.length; i++)
	         {
	           if (bind.childNodes[i].nodeName.toLowerCase() == "xforms:bind")
	           {
	             var id = bind.childNodes[i].getAttribute("id");
	             dojo.debug("loading binding " + id);
	             result[id] = {
	             id: bind.childNodes[i].getAttribute("id"),
	             required: bind.childNodes[i].getAttribute("xforms:required"),
	             nodeset: bind.childNodes[i].getAttribute("xforms:nodeset"),
	             type: bind.childNodes[i].getAttribute("xforms:type"),
	             constraint: bind.childNodes[i].getAttribute("xforms:constraint"),
	             parent: parent
	             };
	             this._loadBindings(bind.childNodes[i], result[id], result);
	           }
	         }
	         return result;
	       },
	       setRepeatIndex: function(id, index)
               {
	         dojo.debug("setting repeat index " + index + " on " + id);
	         var req = create_ajax_request(this,
	          			     "setRepeatIndex",
	          			     { id: id, index: index },
	          			     function(type, data, evt)
	          			     {
	          			       this.xform._handleEventLog(data.documentElement);
	          			     });
	         send_ajax_request(req);
	       },
               fireAction: function(id)
	       {
	         var req = create_ajax_request(this,
	          			     "fireAction",
	          			     { id: id },
	          			     function(type, data, evt)
	          			     {
	          			       dojo.debug("fireAction." + type);
	          			       this.xform._handleEventLog(data.documentElement);
	          			     });
	         send_ajax_request(req);
	       },
	       setXFormsValue: function(id, value)
               {
                 value = value == null ? "" : value;
	         dojo.debug("setting value " + id + " = " + value);
	         var req = create_ajax_request(this,
                                               "setXFormsValue",
                                               { id: id, value: value },
                                               function(type, data, evt)
                                               {
                                                 this.xform._handleEventLog(data.documentElement);
                                               });
	         send_ajax_request(req);
	       },
	       _handleEventLog: function(events)
               {
	         var prototypeClones = [];
	         for (var i = 0; i < events.childNodes.length; i++)
	         {
	           if (events.childNodes[i].nodeType == dojo.dom.ELEMENT_NODE)
	           {
	             var xfe = new alfresco.xforms.XFormsEvent(events.childNodes[i]);
	             dojo.debug("parsing " + xfe.type +
	          	      "(" + xfe.targetId + ", " + xfe.targetName + ")");
	             switch (xfe.type)
	             {
	             case "chiba-index-changed":
	             {
	               var index = Number(xfe.properties["index"]) - 1;
	               xfe.getTarget().handleIndexChanged(index);
	               break;
	             }
	             case "chiba-state-changed":
	             {
	               var valid = xfe.properties["valid"] == "true";
	               xfe.getTarget().setValid(valid);
	               xfe.getTarget().setModified(true);
	               break;
	             }
	             case "chiba-prototype-cloned":
	             {
	               var prototypeId = xfe.properties["prototypeId"];
	               var clone = xfe.getTarget().handlePrototypeCloned(prototypeId);
	               prototypeClones.push(clone);
	               break;
	             }
	             case "chiba-id-generated":
	             {
	               var originalId = xfe.properties["originalId"];
               
	               dojo.debug("handleIdGenerated(" + xfe.targetId + ", " + originalId + ")");
	               var clone = prototypeClones[prototypeClones.length - 1];
	               var node = _findElementById(clone, originalId);
	               if (node)
	               {
	                 dojo.debug("applying id " + xfe.targetId + 
	          		  " to " + node.nodeName + "(" + originalId + ")");
	                 node.setAttribute("id", xfe.targetId);
	               }
	               else
	                 throw new Error("unable to find " + originalId + 
	          		       " in clone " + dojo.dom.innerXML(clone));
	               break;
	             }
	             case "chiba-item-inserted":
	             {
	               var position = Number(xfe.properties["position"]) - 1;
	               
	               var clone = prototypeClones.pop();
	               xfe.getTarget().handleItemInserted(clone, position);
	               break;
	             }
	             case "chiba-item-deleted":
	             {
	               var position = Number(xfe.properties["position"]) - 1;
	               xfe.getTarget().handleItemDeleted(position);
	               break;
	             }
	             case "chiba-replace-all":
	               if (this.submitWidget)
	               {
	                 this.submitWidget.done = true;
	                 this.submitWidget.currentButton.click();
	               }
	               break;
	             case "xforms-valid":
	               xfe.getTarget().setValid(true);
                       xfe.getTarget().setModified(true);
	               break;
	             case "xforms-invalid":
	               xfe.getTarget().setValid(false);
                       xfe.getTarget().setModified(true);
	               break;
	             case "xforms-required":
	               xfe.getTarget().setRequired(true);
	               break;
	             case "xforms-optional":
	               xfe.getTarget().setRequired(false);
	               break;
	             case "xforms-submit-error":
	               var invalid = this.rootWidget.getWidgetsInvalidForSubmit();
	               var msg = "Please provide values for all required fields.";
//	               msg += "<br/><ul>";
	               for (var j = 0; j < invalid.length; j++)
	               {
                         invalid[j].showAlert();
//	                 msg += "<li>" + invalid[j].getAlert() + "</li>";
	               }
//	               msg += "</ul>";
	               _show_error(msg);
	               break;
	             default:
	             {
	               dojo.debug("unhandled event " + events.childNodes[i].nodeName);
	             }
	             }
	           }
	         }
	       }
	     });

function _findElementById(node, id)
{
  dojo.debug("looking for " + id + 
	     " in " + node.nodeName + 
	     "(" + node.getAttribute("id") + ")");
  if (node.getAttribute("id") == id)
    return node;
  for (var i = 0; i < node.childNodes.length; i++)
  {
    if (node.childNodes[i].nodeType == dojo.dom.ELEMENT_NODE)
    {
      var n = _findElementById(node.childNodes[i], id);
      if (n)
	return n;
    }
  }
  return null;
}

function create_ajax_request(xform, serverMethod, methodArgs, load, error)
{
  var result = new dojo.io.Request(WEBAPP_CONTEXT + "/ajax/invoke/XFormsBean." + serverMethod, "text/xml");
  result.xform = xform;
  result.content = methodArgs;

  result.load = load;
  dojo.event.connect(result, "load", function(type, data, evt)
		     {
//		       _hide_errors();
		       ajax_request_load_handler(this);
		     });
  result.error = error || function(type, e)
  {
    dojo.debug("error [" + type + "] " + e.message);
    _show_error(e.message);
    ajax_request_load_handler(this);
  };
  return result;
}

function _hide_errors()
{
  var errorDiv = document.getElementById("alf-xforms-error");
  if (errorDiv)
    errorDiv.style.display = "none";
}

function _show_error(msg)
{
    var errorDiv = document.getElementById("alf-xforms-error");
    if (!errorDiv)
    {
      errorDiv = document.createElement("div");
      errorDiv.setAttribute("id", "alf-xforms-error");
      errorDiv.setAttribute("class", "infoText statusErrorText");
      errorDiv.setAttribute("style", "padding: 2px; border: 1px solid #003366");
      var alfUI = document.getElementById("alf-ui");
      dojo.dom.prependChild(errorDiv, alfUI);
    }
    if (errorDiv.style.display == "block")
      errorDiv.innerHTML = errorDiv.innerHTML + "<br/>" + msg;
    else
    {
      errorDiv.innerHTML = msg;
      errorDiv.style.display = "block";
    }
}

function send_ajax_request(req)
{
  ajax_request_send_handler(req);
  dojo.io.queueBind(req);
}

function _get_ajax_loader_element()
{
  var result = document.getElementById("alf-ajax-loader");
  if (result)
    return result;
  result = document.createElement("div");
  result.setAttribute("id", "alf-ajax-loader");
  result.setAttribute("style", "position: absolute; background-color: red; color: white; top: 0px; right: 0px;");
  dojo.style.hide(result);
  document.body.appendChild(result);
  return result;
}

var _ajax_requests = [];

function ajax_request_send_handler(req)
{
  _ajax_requests.push(req);
  ajax_loader_update_display();
}

function ajax_loader_update_display()
{
  var ajaxLoader = _get_ajax_loader_element();
  ajaxLoader.innerHTML = (_ajax_requests.length == 0
			  ? "Idle"
			  : "Loading" + (_ajax_requests.length > 1
					 ? " (" + _ajax_requests.length + ")"
					 : "..."));
  dojo.debug(ajaxLoader.innerHTML);
  if (/* djConfig.isDebug && */ _ajax_requests.length != 0)
  {
    dojo.style.show(ajaxLoader);
  }
  else
  {
    dojo.style.hide(ajaxLoader);
  }
}

function ajax_request_load_handler(req)
{
  var ajaxLoader = _get_ajax_loader_element();
  var index = -1;
  for (var i = 0; i < _ajax_requests.length; i++)
  {
    if (_ajax_requests[i] == req)
    {
      index = i;
      break;
    }
  }
  if (index == -1)
    _ajax_requests.splice(index, 1);
  else
    throw new Error("unable to find " + req.url);
  ajax_loader_update_display();
}

function _getElementsByTagNameNS(parentNode, ns, nsPrefix, tagName)
{
  return (parentNode.getElementsByTagNameNS
	  ? parentNode.getElementsByTagNameNS(ns, tagName)
	  : parentNode.getElementsByTagName(nsPrefix + ":" + tagName));
}

function _evaluateXPath(xpath, contextNode, result_type)
{
  var xmlDocument = contextNode.ownerDocument;
  dojo.debug("evaluating xpath " + xpath + " on node " + contextNode.nodeName +
	     " in document " + xmlDocument);
  var result = null;
  if (xmlDocument.evaluate)
  {
    var nsResolver = (xmlDocument.createNSResolver 
		      ? xmlDocument.createNSResolver(xmlDocument.documentElement) :
		      null);
    result = xmlDocument.evaluate(xpath, 
				  contextNode, 
				  nsResolver, 
				  result_type,
				  null);
    if (result)
    {
      switch (result_type)
      {
      case XPathResult.FIRST_ORDERED_NODE_TYPE:
	result = result.singleNodeValue;
	break;
      case XPathResult.BOOLEAN_TYPE:
	result = result.booleanValue;
	break;
      case XPathResult.STRING_TYPE:
	result = result.stringValue;
	break;
      }
    }
  }
  else
  {
    xmlDocument.setProperty("SelectionLanguage", "XPath");
    var namespaces = [];
    for (var i = 0; i < xmlDocument.documentElement.attributes.length; i++)
    {
      var attr = xmlDocument.documentElement.attributes[i];
      if (attr.nodeName.match(/^xmlns:/))
	namespaces.push(attr.nodeName + "=\'" + attr.nodeValue + "\'");
    }
    dojo.debug("using namespaces " + namespaces.join(","));
    xmlDocument.setProperty("SelectionNamespaces", namespaces.join(' '));
    if (result_type == XPathResult.FIRST_ORDERED_NODE_TYPE)
      result = xmlDocument.selectSingleNode(xpath);
    else if (result_type == XPathResult.BOOLEAN_TYPE)
      result = true;
  }
  dojo.debug("resolved xpath " + xpath + " to " + result);
  return result;
}

if (!XPathResult)
{
  var XPathResult = {};
  XPathResult.ANY_TYPE = 0;
  XPathResult.NUMBER_TYPE = 1;
  XPathResult.STRING_TYPE = 2;
  XPathResult.BOOEAN_TYPE = 3;
  XPathResult.FIRST_ORDERED_NODE_TYPE = 9;
}

if (!Array.prototype.indexOf)
{
  Array.prototype.indexOf = function(o)
  {
    for (var i = 0; i < this.length; i++)
    {
      if (this[i] == o)
	return i;
    }
    return -1;
  }
}