Index: trunk/admin/editor/cmseditor/editor/_source/internals/fck_2.js
===================================================================
diff -u -N -r3121 -r4505
--- trunk/admin/editor/cmseditor/editor/_source/internals/fck_2.js	(.../fck_2.js)	(revision 3121)
+++ trunk/admin/editor/cmseditor/editor/_source/internals/fck_2.js	(.../fck_2.js)	(revision 4505)
@@ -173,11 +173,13 @@
 
 FCK.SetPreview = function()
 {
-	oWindow.document.getElementById('block_'+FCKConfig.block_id).innerHTML =  FCK.GetHTML();
+	var block_name='block_';
+	if(typeof(FCKConfig.block_name) != 'undefined')
+		block_name=FCKConfig.block_name;
+	oWindow.document.getElementById(block_name+FCKConfig.block_id).innerHTML =  FCK.GetHTML();
 }
 
 
-
 FCK.SwitchEditMode = function()
 {
 	// Check if the actual mode is WYSIWYG.