1. 出错信息：TabContainer1 发生了未处理的异常
   A ScripManager is required on the page to use ASP.NET AJAX ScriptComponents

解决办法:   安装ASPAJAXExtSetup.msi, 重启VS,从工具箱AJAX Extension 中把ScriptManager 控件拖到<form>下面

    2.    Sys is not defined 

  解决办法:          在web.config 中加入以下节点

<httpHandlers>
          <add verb="GET" path="ScriptResource.axd" type="Microsoft.Web.Handlers.ScriptResourceHandler" validate="false"/>
    </httpHandlers>

    <httpModules>
      <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    </httpModules>

    3.   Microsoft JScript运行时错误：Sys.ArgumentOutOfRangeException:Value must be an integer.
Parameter name:xActual value was NaN

解决办法: 检查一下页面里是否含有：<frame name="" src="header.aspx" scrolling="no" frameborder="no"></frame>这样的代码,如果有,把frameborder="no"改为frameborder="0",问题解决.