"Anonymous Code" error

Hi,

when I run my app from within VS2008 and type something in a text and tab out, I opens the "anonymous code [debigging]" file and a javascript erro dialog with "Microsoft JScript runtime error: 'a' is undefined" and the content of the file is:

function anonymous() {

ValidatorOnChange(event); a.handleOnChange()

}

I have a requiredFieldvalidator for the textbox in question. I couldn't find anything related to this issue when I googled for it.

There is on onchange event for the textbox.

Thanks.