You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Web form by using ASP.NET AJAX. You write the following client-script code fragment to handle the exceptions thrown from asynchronous postbacks. （Line numbers are included for reference only.） 01 <script type="text/javascript"> 02 function pageLoad（） 03 { 04 var pageMgr = 05 Sys.WebForms.PageRequestManager.getInstance（）； 06 07 } 08 09 function errorHandler（sender， args） 10 { 11 12 } English Chinese Japan Korean - 146 - Test Information Co.， Ltd. All rights reserved. 13 </script> You need to ensure that the application performs the following tasks： ¡；¤Use a common clien-script function named errorHandler. ¡；¤Update a Label control that has an ID named lblEror with the error message. ¡；¤Prevent the browser from displaying any message box or Javascript error What should you do？ （）
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