问个ajax问题

<title id="idTitle">
<%# PageTitle %>
</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<asp:literal id="ScriptHolder" Runat="server"></asp:literal>
<link href="include/css.css" rel="stylesheet" type="text/css">
<script language="javascript" src="ajax/common.ashx"></script>
<SCRIPT language="JavaScript">
function popmenu(tableName)
{
var dis = tableName.style.display;
var rtn = AjaxProcess.ChangePopMenuDisplay(dis).value;// 2006-10-11 罗爱荣 modify

tableName.style.display = rtn;
/*
if (tableName.style.display=="none")
{

tableName.style.display="block";
}
else
{
tableName.style.display="none";
}
*/
}

function CheckPreSolusion()
{ var isAlert = AjaxProcess.IsNeedPreSolutionAlert().value;
if(isAlert)
{
window.open('pages/PriorProjectAlertList.aspx', 'PriorProjectAlertList', 'height=420, width=800, top=150, left=100, toolbar=no, menubar=no, scrollbars=yes, resizable=no,location=no, status=no');
}

}

</SCRIPT>
<script language="javascript" src="ajax/EISS.UserControl.SysMenus,EISS.ashx"></script>
我运行页面的时候总报 SysMenus未定义 怎么回事 应该是ajax的问题吧