diff --git a/javascript/NewsletterAdmin_right.js b/javascript/NewsletterAdmin_right.js
index 25b308ab..28fb66eb 100755
--- a/javascript/NewsletterAdmin_right.js
+++ b/javascript/NewsletterAdmin_right.js
@@ -115,7 +115,7 @@ Behaviour.register({
 			if(allIframes) for(i=0;i<allIframes.length;i++) {
 				try {
 					allIframes[i].contentWindow.location.href = allIframes[i].src;
-				} catch(er) {alert(er.message);}
+				} catch(er) {alert('Error in NewsletterAdmin_right.js #Form_EditForm::loadNewPage(): ' + er.message);}
 			}
 			
 			_TAB_DIVS_ON_PAGE = [];