[jQuery] I am using jQuery Validation and facing Stopping Script in IE7

Scripts
---------------
JQuery 1.2.6
JQuery Validation 1.5.5

URL: http://docs.jquery.com/Plugins/Validation

I have a form and have provided the validation to that form using

validator=jQuery("#xava_form").validate({
                        // the errorPlacement has to take the table layout into 
account
                        errorPlacement: function(error, element) {
                                var 
elementError=jQuery(document.getElementById(element.attr
("name")+"Error"));
                                if(elementError)
                                {
                                        elementError.html("");
                                        error.appendTo(elementError);
                                }
                        }
                });


I use this validation when any user clicks any button by using
                if(!validator.form())
                        return false;

It performs the ajax operation which changes the innerHTML content of
<form> tag. When I try this operation for some no of times it starts
giving Stop Scripting message with Yes/No which signify that this
operation can happen for long.
The content of form changes dynamically.
I even tried by using new jQuery 1.3.2 and jQuery Validation 1.6 but
the same problem persists

Thanks in advance

CSJakharia