diff -u  ./extension/ezevent/design/standard/javascript/ezevent.js.old ./extension/ezevent/design/standard/javascript/ezevent.js 
--- ./extension/ezevent/design/standard/javascript/ezevent.js.old       2010-12-02 17:45:25.000000000 +0100 
+++ ./extension/ezevent/design/standard/javascript/ezevent.js   2010-12-02 18:10:52.000000000 +0100 
@@ -139,7 +139,8 @@ 
     gLinkinProgress = true; 
     if ( gLinkTarget != '' ) 
     { 
-        lTarget = $( gLinkTarget ); 
+        //lTarget = $( gLinkTarget ); 
+        lTarget = document.getElementById(gLinkTarget); 
         gLinkTarget = ''; 
     } 
     else 
@@ -194,7 +195,15 @@ 
  
 function  ezevent_addUserListEntry( id, uname ) 
 { 
-    var userList = $( 'list_of_users' ); 
+    var user = document.getElementById('list_of_users_entry_' + id); 
+    if ( user )  
+    { 
+        // user has been already added 
+       return false; 
+    } 
+ 
+    //var userList = $( 'list_of_users' ); 
+    var userList = document.getElementById('list_of_users'); 
  
     if ( !userList ) 
     { 
@@ -219,7 +228,8 @@ 
  
 function  ezevent_removeUserListEntry( id ) 
 { 
-    var item = $( id ); 
+    //var item = $( id ); 
+    var item = document.getElementById(id); 
      
     if ( item ) 
     {