Index: /CKEditor/trunk/_source/plugins/dialog/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/dialog/plugin.js	(revision 3288)
+++ /CKEditor/trunk/_source/plugins/dialog/plugin.js	(revision 3289)
@@ -1569,18 +1569,18 @@
 					' frameborder="0"' +
 					' id="cke_dialog_background_iframe"' +
-					' src="javascript:void(' );
+					' src="javascript:' );
 
 			html.push( 
 					isCustomDomain ?
-						'(function(){' +
+						'void((function(){' +
 							'document.open();' +
 							'document.domain=\'' + document.domain + '\';' +
 							'document.close();' +
-						'})()'
+						'})())'
 					:
-						'0' );
+						'\'\'' );
 
 			html.push( 
-					')"' +
+					'"' +
 					' style="' +
 						'position:absolute;' +