javascript的问题 一个替换鼠标右键的脚本

不说了．．．．直接上码！！！！ 这是前台： 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > 
<head runat="server"> 
    <title>无标题页 </title> 
    <script type="text/javascript" src="JScript.js"> </script> 
</head> 
<body oncontextmenu="showmenu(); return false;" onclick="hiddmenu();"> 
    <form id="form1" runat="server"> 
        <div id="vv"  style=" position:absolute; visibility:hidden; border-right: 2px outset; border-top: 2px outset; font-weight: lighter; 
            font-size: 9pt; border-left: 2px outset;  border-bottom: 2px outset; 
          width:100px; height:100px; background-color: menu"> 
          &nbsp; <span  onclick="window.history.go(-1)">后退 </span> <br /> 
          &nbsp; <span  onclick="">前进 </span> <br /> 
          <hr /> 
            &nbsp; <a href="default.aspx" target="_parent">文件(F) </a> <br /> 
            &nbsp; <a href="www.sina.com" target="_parent">编辑(E) </a> <br /> 
            <hr /> 
            &nbsp; </div> 
            
    </form> 
</body> 
</html> 这是JS文件 
// JScript 文件 
    function showmenu() 
    { 
        document.getElementById("vv").style.visibility="visible"; 
        var x=document.body.clientWidth-event.clientX; 
        var y=document.body.clientHeight-event.clientY; 
        if(x <document.getElementById("vv").offsetWidth) 
        { 
            document.getElementById("vv").style.left=event.clientX-document.getElementById("vv").offsetWidth+document.body.scrollLeft; 
        } 
        else 
        { 
        document.getElementById("vv").style.left=event.clientX+document.body.scrollLeft; 
        } 
        if(y <document.getElementById("vv").offsetHeight) 
        { 
            document.getElementById("vv").style.top=event.clientY-document.getElementById("vv").offsetHeight+document.body.scrollTop; 
        } 
        else 
        { 
        document.getElementById("vv").style.top=event.clientY+document.body.scrollTop; 
        }     } 
    function hiddmenu() 
    { 
        document.getElementById("vv").style.visibility= "hidden"; 
    } 
这是ＣＳ页面的： 
public partial class Default3 : System.Web.UI.Page 
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 
        Response.Write("hello world"); 
    } 
} 
问题出现了．．如果我不输出hello world　　这个脚本就不好用．． 
输出就不没问题．．．郁闷．．．