ASP.NET指定前台事件执行JS方法错误
前台JS定义:

  <script type="text/javascript" src="JavaScript/DataRow.js"language="javascript">  
   
  $(window).ready(function()
{
resizeWin();
});

$(window).load(function()
{
resizeWin();
});

$(window).resize(function()
{
resizeWin();

});

function resizeWin()
{
var h = document.documentElement.clientHeight;
$("#frmContent").height(h - 120);
$("#navbarSitMap").height(h - 120);
}  

  function showDesktop()
  {
  $("#frmContent")[0].src="~/Desktop.aspx";
  return false;
  }  
   
  function NavbarSitMap_OnItemSelect(sender, eventArgs) 
  {
  if(eventArgs.get_item().getProperty('Url'))
  {
  document.getElementById('frmContent').src=eventArgs.get_item().getProperty('Url');
  }  
  }
   
  </script>

前台控件定义:

<table border="0" width="100%" cellpadding="0" cellspacing="0">
  <tr>  
  <td class="style1">  
  <CA:NavBar ID="NavbarSitMap" runat="server" AutoPostBackOnSelect ="false" SkinID ="Navbar"
  EnableViewState ="true" SiteMapXmlFile ="~/System.xml" Height="50px">
  <ClientEvents>
  <ItemSelect EventHandler ="NavbarSitMap_OnItemSelect" />
  </ClientEvents>
  </CA:NavBar>  
  </td>
  <td>
  <table border="0" width="100%" cellpadding="0" cellspacing="0" 
  style="height: 383px">
  <tr>
  <td>
  <iframe id="frmContent" width="100%" src="WebForm2.aspx" scrolling="auto" frameborder="0" cellpadding="0" cellspacing="0">
  </iframe>
  </td>
  </tr>
  </table> 
   
  </td>
  </tr>
  </table>
运行时候总提示 NavbarSitMap_OnItemSelect 未定义

------解决方案--------------------
EventHandler ="NavbarSitMap_OnItemSelect" 这个估计是你自定义的方法吧 没有用的话就删除这个吧 要是用的话就在后台添加上试试呢