千辛万苦，找到兼容ie，firefox，chrome的JavaScript右键菜单

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IE Chrome Firefox JavaScript HTML

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>javascript右键菜单</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<style>
.DreamMenu {
position: absolute;
visibility: hidden;
z-index: 100;
overflow: hidden;
width: 150px;
background-color: buttonface;
border: dimgray 1px solid !important;
border: buttonhighlight menu menu buttonhighlight 2px outset;
padding: 1px !important;
padding: 1px 1px 1px 0px;
font-size: 12px;
}

.DreamMenu ul {
margin: 1px;
border-bottom: buttonhighlight 1px solid;
border-top: buttonshadow 1px solid;
}

.DreamMenu a {
display: block;
width: 100%;
padding: 1px 2px 2px 20px;
cursor: default;
text-decoration: none;
color: #000000;
}

.DreamMenu a:hover {
background: highlight;
color: #ffffff;
}
</style>
</head>
<body menu='menu'>

<script>
/***
DreamCore - JsLib/Menu
Date : Dec 03, 2006
Copyright: DreamSoft Co.,Ltd.
Mail : Dream@Dreamsoft.Ca
Author : Egmax
Browser : IE5.0&+,Firefox1.5&+,Netscape7.0&+
Update:
***/
if(!document.all) document.captureEvents(Event.MOUSEDOWN);
var _Tmenu = 0;
var _Amenu = 0;
var _Type = 'A';
var _Menu = "null";
document.onclick = _Hidden;
function _Hidden()
{
if(_Tmenu==0) return;
document.getElementById(_Tmenu).style.visibility='hidden';
_Tmenu=0;
}

document.oncontextmenu = function (e)
{
_Hidden();
var _Obj = document.all ? event.srcElement : e.target;
if(_Type.indexOf(_Obj.tagName) == -1) return;
_Amenu = _Obj.getAttribute('menu');
if(_Amenu == 'null') return;
if(document.all) e = event;
_ShowMenu(_Amenu, e);
return false;
}
function _ShowMenu(Eid, event)
{
_Menu = document.getElementById(Eid);

var _Left = event.clientX + document.body.scrollLeft;
var _Top = event.clientY + document.body.scrollTop;
_Menu.style.left = _Left.toString() + 'px';
_Menu.style.top = _Top.toString() + 'px';
_Menu.style.visibility = 'visible';
_Tmenu = Eid;
_Menu.onclick = transfer;
_Menu.oncontextmenu = no_context_menu;
}

function transfer(e){
e=e||window.event;e.cancelBubble=true;
}

function no_context_menu(e){
e=e||window.event;
e=e||window.event;e.cancelBubble=true;
return;
}
/***
可以支持其他标签INPUT,IMG
***/
</script>
<script>_Type='INPUT,A,DIV,BODY,IMG';</script>

<div id="menu" class='DreamMenu'>
<a href='javascript:;'>您好</a>
<a href='javascript:;'>我是主菜单</a>
<a href='javascript:;'>在页面上单击</a>
<a href='javascript:;'>就可以看到我</a>
<ul></ul>
<a href='javascript:;'>打印</a>
</div>

<div id="menu2" class='DreamMenu'>
<a href='javascript:;'>哈哈</a>
<a href='javascript:;'>我是个链接</a>
<a href='javascript:;'>好开心啊</a>
<a href='javascript:;'>查看</a>
<ul></ul>
<a href='javascript:;'>打印</a>
</div>

<div id="menu3" class='DreamMenu'>
<a href='javascript:;'>哈哈</a>
<a href='javascript:;'>我是图片</a>
<a href='javascript:;'>虽然打不开</a>
<a href='javascript:;'>查看</a>
<ul></ul>
<a href='javascript:;'>打印</a>
</div>
<table>
<tr>
<td height=100>

<a href='javascript:;' menu='menu2'>菜单1</a>
<a href='javascript:;' menu='menu2'>菜单2</a>
</td>
</tr>
</table>

<div style='height: 300;' menu='menu'></div>
<img src='qiougou.gif' menu='menu3' />
</body>

</html>