[Moo] formId.addEvent submit does not work in IE8

[Sitthykun LY]

Hello
I have problem IE8 and mootools-1.2.4-core-yc.js with the following code:

var test = new Class({
initialize: function(){
this.frm = document.forms['formname'];
this.testFunc();
},
testFunc: function(){
if($chk(this.frm)){
this.frm.addEvent('submit', function(){
alert('test');
}.bindWidthEvent(this));
}
}
 });

IE8 error:

Message: Object doesn't support this property or method
Line: 8

Please help me.


-- 
Best regards,
Sitthykun LY