You are the senior&ens

You are the senior technician at Certkiller.com. You have been instructed to create a MicrosoftASP.NET application using Microsoft .NET Framework v3.5.  You make use of ASP.NET AJAX to create a web form. In order to handle exception from asynchronous postbacks you decide to write the client script code fragment below. You write thefollowing client-script code fragment to handle the exceptions thrown from asynchronouspostbacks. （The line numbers is included for reference purposes） 01 <script type="text/javascript"> 02 function pageLoad（） 03 { 04  var pageMgr = Sys.WebForms.PageRequestManager.getInstance（）； 05 06 } 07 08 function errorHandler（sender， args） 09 { 10 11 } 12 </script>  You receive an instruction from the network administrator to ensure that the application is able toexecute the criteria below： * You need to ensure that the application makes use of a common client-script function namederrorHandler. * The Label control with an ID named TestError should be updated with the error message.* The browser should not display any message box or Javascript error  How can this be accomplished？（）

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