- New thumbnail transformation "imgpreview" that creates 400x400 previews.

- Document details preview works for webpreview and imgpreview
- Helper method in alfresco.js for checking of an array contatins a value.
- Helper method in alfresco.js for checking if sufficient flash player is installed.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@10476 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

config/alfresco/thumbnail-service-context.xml

@@ -99,6 +99,25 @@
 	    			</property>
 	    		</bean>
     		
+             <!-- Image preview thumbnail options -->
+             <bean class="org.alfresco.repo.thumbnail.ThumbnailDefinition">
+                <property name="name" value="imgpreview" />
+                <property name="mimetype" value="image/png"/>
+                <property name="transformationOptions">
+                   <bean class="org.alfresco.repo.content.transform.magick.ImageTransformationOptions">
+                      <property name="resizeOptions">
+                         <bean class="org.alfresco.repo.content.transform.magick.ImageResizeOptions">
+                            <property name="width" value="400"/>
+                            <property name="height" value="400"/>
+                            <property name="maintainAspectRatio" value="true"/>
+                            <property name="resizeToThumbnail" value="true" />
+                         </bean>
+                      </property>
+                   </bean>
+                </property>
+                <property name="placeHolderResourcePath" value="alfresco/thumbnail/thumbnail_placeholder_imgpreview.png" />
+             </bean>
+
 				<!-- User avatar image thumbnail options -->
 				<bean class="org.alfresco.repo.thumbnail.ThumbnailDefinition">
 					<property name="name" value="avatar" />