Updatepanel Error in IE

I am using updatepanel in a page.  But it give error "Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException".

There is not Response.Write on page. I have tried by setting validaterequest to false.

I have also tried the following code in javascript

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);  function EndRequestHandler(sender, args)  {    if (args.get_error() != undefined)     {         else if(args.get_error().name === 'Sys.WebForms.PageRequestManagerTimeoutException')        {              args.set_errorHandled(true);         }         else         {             // not this kind of error so let the default behavior happen.        }     }  }

But using this code postback event for any control on the page does not work

But the same page work in FireFox,Chrome (without above JavaScript code)