单项选择题 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？（）

单项选择题 You work as a Web Developer at Certkiller.com. You use Microsoft ASP.NET 3.5 to create a Webapplication.  A Hypertext Transfer Protocol （HTTP） handler is implemented to produce Human Interactive Proof（HIP） images. You have to make sure that the current page invoke the handler and automaticallycontinue executing after the handler completes execution.  What should you do？（）

单项选择题 Certkiller.com has employed you as a Web Application Developer. You are in the process ofcreating an ASP.NET application. In order to create the application you make use of Microsoft.NET Framework v3.5.  The Web application makes use of ASP.NET AJAX. You receive a request from management todeploy thid application in a Web farm environment. You thus decide to configure the SessionStatefor the application.  How can this be accomplished？（）