script error in IE when leaving page if jquery is also used

[lachlan roche]

When we use RADEditor and jQuery on the same page, IE 6/7/8 throw a script error during page unload.
We use $telerik.addExternalHandler and editor.attachEventHandler. No jQuery event handlers are used.

This is version 2010.1.519.35 of Telerik.Web.UI.

The exception is:

Error: Sys.ArgumentNullException: Value cannot be null.
Parameter name: element

The JScript call stack:

JScript anonymous function
JScript anonymous function
Sys$Application$_unloadHandler
Sys$Application$Dispose
JScript anonymous function
JScript anonymous function
Sys$Ui$DomEvent$removeHandler

The inner most anonymous function is from Telerik.Web.UI.Editor.RadEditor.js, and the call to removeHandler is from this code:

},_registerModeChangeHandler:function(c){if(c){this._onModeButtonClickDelegate=Function.createDelegate(this,this._onModeButtonClick);
$addHandler(this._getModeButtonsWrapper(),"click",this._onModeButtonClickDelegate);
}else{if(this._onModeButtonClickDelegate){$removeHandler(this._getModeButtonsWrapper(),"click",this._onModeButtonClickDelegate);
this._onModeButtonClickDelegate=null;
}}},_onModeButtonClick:function(h){var g=this.get_mode();

A workaround is to add the following as the last script on the page:

<!--[if IE]>
<script type="text/javascript">
    (function() {
        var remove = window.$removeHandler;
        window.$removeHandler = function(a,b,c) {
            if (a) {
                remove(a,b,c);
            }
        }
    })();
</script>
<![endif]-->

[Fiko]

Hi lachlan,

Do you use an external jQuery library? if so, I recommend you to use the one embedded in Telerik assembly. More details about how to use jQuery object can be found in this help article.

Additionally, I recommend you to update to the recent version of the RadControls - 2010.2 713.

I hope this helps.

Regards,
Fiko
the Telerik team