进不去js写的函数，请指教

进不去aa这个函数，请指教
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script type="text/javascript" language="javascript">
    function aa()
    {
     alert("999");
    }
</script><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body >
    <form id="form1" runat="server">
    <div>
        <object classid="clsid:C784847A-A3D4-4960-A12F-749EB6A31DE1" id="GeoUrban3DWeb1" style="width: 559px; height: 366px" oninit="aa()" >
        </object>
    </div>
    </form>
</body>
</html>