仿xp下拉菜单
用JS实现一个简单的仿xp下拉菜单，贴出来，希望对其它人有用，有兴趣的朋友可以对快捷键功能进行扩展，目前留有接口，但未实现。
menu.htm（菜单主文件）
<html>
<head>
<title>Noteless Valley(lijun.org)程序示例</title>
<meta name=GENERATOR content=Microsoft Visual Studio.net 7.0>
<meta name=vs_targetSchema content=http://schemas.microsoft.com/intellisense/ie5>
<meta http-equiv=Content-Type content=text/html; charset=gb2312>
<link href=xp_menu.css rel=stylesheet type=text/css>
<script language=javascript src=xp_menu.js></script>
<script language=javascript for=document event=onselectstart>
<!--
return document_onselectstart()
//-->
</script>
<script language=javascript for=document event=onclick>
<!--
return document_onclick()
//-->
</script>
</head>
<body scroll=no language=javascript onresize=return window_onresize() onload=return window_onload()>
<script language=javascript>
<!--
//定义一个主菜单对象
var mnuMain = new menu(mnuMain);
mnuMain.bar[0] = new menu_bar(mnuMainNL,,无名谷,,Noteless Valley,,0,mnuNL);
mnuMain.bar[1] = new menu_bar(mnuMainSiteAdmin,,网站管理,,网站管理,,0,mnuSiteAdmin);
mnuMain.bar[2] = new menu_bar(mnuMainSystem,,系统管理,,系统管理,,0,mnuSystem);
mnuMain.bar[3] = new menu_bar(mnuMainShow,,演示菜单,,Menu Show,,0,mnuShow);
popMainMenu(mnuMain,0,0,100%,27); //激活主菜单，通过参数确定主菜单的位置
var mnuNL = new menu(mnuNL);
mnuNL.bar[0] = new menu_bar(mnuHomePage,,首页,,HomePage,,1,http://lijun.org);
mnuNL.bar[1] = new menu_bar(mnuDesign,,网页设计,,Design,,1,http://lijun.org/article.asp?topic=1);
mnuNL.bar[2] = new menu_bar(mnuProgram,,网络编程,,Program,,1,http://lijun.org/article.asp?topic=2);
mnuNL.bar[3] = new menu_bar(mnuOthers,,其它文章,,Others,,1,http://lijun.org/article.asp?topic=3);
popSubMenu(mnuNL);
var mnuSiteAdmin = new menu(mnuSiteAdmin)
mnuSiteAdmin.bar[0] = new menu_bar(mnuAddressUpdate,,访问地区更新,,访问地区更新,,1,AddressUpdate.asp);
popSubMenu(mnuSiteAdmin);
var mnuSystem = new menu(mnuSystem);
mnuSystem.bar[0] = new menu_bar(mnuSysUser,,用户管理,,用户管理,,1,userAdmin.asp);
mnuSystem.bar[1] = new menu_bar(mnuSysAuthority,,权限管理,,权限管理,,1,authority.asp);
mnuSystem.bar[2] = new menu_bar(\-,,,,,,,);
mnuSystem.bar[3] = new menu_bar(mnuSysPwdChange,,口令修改,,口令修改,,1,chgpwd.asp);
mnuSystem.bar[4] = new menu_bar(\-,,,,,,,);
mnuSystem.bar[5] = new menu_bar(mnuSysHelp,,帮助,,帮助,,1,help.asp);
mnuSystem.bar[6] = new menu_bar(mnuSysAbout,,关于本系统,,关于本系统,,1,about.asp);
mnuSystem.bar[7] = new menu_bar(\-,,,,,,,);
mnuSystem.bar[8] = new menu_bar(mnuSysExit,,退出系统,,退出本系统,,1,quit.asp);
popSubMenu(mnuSystem);
var mnuShow = new menu(mnuShow);
mnuShow.bar[0] = new menu_bar(mnuShow1,,演示菜单一,,Menu Show 1,,1,menushow1.asp);
mnuShow.bar[1] = new menu_bar(mnuShow2,,演示菜单二,,Menu Show 2,,0,mnuShow_2);
mnuShow.bar[2] = new menu_bar(mnuShow3,,演示菜单三,,Menu Show 3,,1,menushow3.asp);
mnuShow.bar[3] = new menu_bar(\-,,,,,,,);
mnuShow.bar[4] = new menu_bar(mnuShow4,,演示菜单四,,Menu Show 4,,1,menushow4.asp);
mnuShow.bar[5] = new menu_bar(mnuShow5,,演示菜单五,,Menu Show 5,,0,mnuShow_2);
popSubMenu(mnuShow);
var mnuShow_2 = new menu(mnuShow_2);
mnuShow_2.bar[0] = new menu_bar(mnuShow21,,演示菜单二一,,Menu Show 2.1,,1,menushow21.asp);
mnuShow_2.bar[1] = new menu_bar(mnuShow22,,演示菜单二二,,Menu Show 2.2,,0,mnuShow_22);
mnuShow_2.bar[2] = new menu_bar(mnuShow23,,演示菜单二三,,Menu Show 2.3,,1,menushow23.asp);
mnuShow_2.bar[3] = new menu_bar(mnuShow24,,演示菜单二四,,Menu Show 2.4,,0,mnuShow_22);
mnuShow_2.bar[4] = new menu_bar(mnuShow25,,演示菜单二五,,Menu Show 2.5,,1,menushow25.asp);
popSubMenu(mnuShow_2);
var mnuShow_22 = new menu(mnuShow_22);
mnuShow_22.bar[0] = new menu_bar(mnuShow221,,演示菜单二二一,,Menu Show 2.2.1,,1,menushow221.asp);
mnuShow_22.bar[1] = new menu_bar(mnuShow222,,演示菜单二二二,,Menu Show 2.2.2,,1,menushow222.asp);
mnuShow_22.bar[2] = new menu_bar(mnuShow223,,演示菜单二二三,,Menu Show 2.2.3,,1,menushow223.asp);
popSubMenu(mnuShow_22);
//-->
</script>
<table border=0 cellpadding=0 cellspacing=0><tr><td height=27>此部分已经被顶部菜单条覆盖</td></tr></table>
<p id=lblOutput>信息提示区域</p>
</body>
</html>
xp_menu.css（样式表）
body {
FONT-SIZE: 13px;
MARGIN: 0px;
SCROLLBAR-SHADOW-COLOR: silver;
SCROLLBAR-3DLIGHT-COLOR: silver;
LINE-HEIGHT: 20px;
FONT-FAMILY: Verdana, 宋体;
SCROLLBAR-DARKSHADOW-COLOR: silver;
BACKGROUND-COLOR: #ff99cc;
border: none;
}
DIV.MainMenuBG
{
border-right: teal 1px solid;
font-size: 14px;
border-left: #ffffff 1px solid;
cursor: default;
color: #000000;
border-bottom: teal 1px solid;
font-family: Verdana, 宋体;
position: absolute;
background-color: #d6d3ce;
}
DIV.MainMenu
{
border-right: #d6d3ce 1px solid;
padding-right: 8px;
border-top: #d6d3ce 1px solid;
padding-left: 8px;
padding-bottom: 1px;
border-left: #d6d3ce 1px solid;
cursor: default;
padding-top: 1px;
border-bottom: #d6d3ce 1px solid;
position: absolute;
background-color: #d6d3ce;
}
DIV.MainMenuOver
{
border-right: #08246b 1px solid;
padding-right: 8px;
border-top: #08246b 1px solid;
padding-left: 8px;
padding-bottom: 1px;
border-left: #08246b 1px solid;
cursor: default;
padding-top: 1px;
border-bottom: #08246b 1px solid;
position: absolute;
background-color: #b5bed6;
}
DIV.MainMenuClick
{
border-right: #636563 1px solid;
padding-right: 8px;
border-top: #636563 1px solid;
padding-left: 8px;
padding-bottom: 1px;
border-left: #636563 1px solid;
cursor: default;
padding-top: 1px;
border-bottom: #636563 1px solid;
position: absolute;
background-color: #dedbd6;
}
DIV.SubMenuBG
{
border-right: #636563 1px solid;
border-top: #636563 1px solid;
font-size: 14px;
visibility: hidden;
border-left: #636563 1px solid;
color: #000000;
border-bottom: #636563 1px solid;
font-family: Verdana, 宋体;
position: absolute;
background-color: #fffbf7;
}
DIV.SubMenu
{
cursor: default;
position: absolute;
}
DIV.SubMenuOver
{
cursor: default;
position: absolute;
}
TD.ico
{
border-top: #dedbd6 1px solid;
border-left: #dedbd6 1px solid;
border-bottom: #dedbd6 1px solid;
background-color: #dedbd6;
}
TD.icoOver
{
border-top: #08246b 1px solid;
border-left: #08246b 1px solid;
border-bottom: #08246b 1px solid;
background-color: #b5bed6;
border-right-width: 1px;
border-right-color: #08246b;
}
TD.text
{
padding-right: 2px;
border-top: #fffbf7 1px solid;
padding-left: 5px;
border-bottom: #fffbf7 1px solid;
background-color: #fffbf7;
}
TD.textOver
{
padding-right: 2px;
border-top: #08246b 1px solid;
padding-left: 5px;
border-bottom: #08246b 1px solid;
background-color: #b5bed6;
}
TD.skey
{
padding-right: 2px;
border-top: #fffbf7 1px solid;
padding-left: 2px;
border-bottom: #fffbf7 1px solid;
background-color: #fffbf7;
}
TD.skeyOver
{
padding-right: 2px;
border-top: #08246b 1px solid;
padding-left: 2px;
border-bottom: #08246b 1px solid;
background-color: #b5bed6;
}
TD.sub
{
border-right: #fffbf7 1px solid;
border-top: #fffbf7 1px solid;
border-bottom: #fffbf7 1px solid;
background-color: #fffbf7;
}
TD.subOver
{
border-right: #08246b 1px solid;
border-top: #08246b 1px solid;
border-bottom: #08246b 1px solid;
background-color: #b5bed6;
}
DIV.SubMenu TD
{
font-size: 14px;
padding-top: 2px;
}
xp_menu.js（.js包含文件）
<!--
// menu source code
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// 以下为建立菜单的部分
//_______________________________________
//菜单条的结构
function menu_bar(name,ico,text,key,tip,skey,type,cmd) {
this.name = name; //名称
this.ico = ico; //图标
this.text = text; //文字
this.key = key; //热键
this.tip = tip; //提示
this.skey = skey; //快捷键
this.type = type; //命令类型，0为弹出下级菜单，1为执行一个命令(跳转到另一个文件)
this.cmd = cmd; //下级菜单的名称或命令字符串，根据type的值而定
}
//菜单的结构
function menu(name) {
this.name = name; //名称
this.bar = new Array(); //所包含的菜单条数组
}
//输出一已定义的主菜单，横排的
function popMainMenu(menu,left,top,width,height) {
var strHTML, posLeft, posTop, i;
strHTML = <div id= menu.name style=left: left ;top: top ;width: width ;height: height class=MainMenuBG>
document.write (strHTML);
posLeft = 2;
posTop = 1;
for (i=0;i<menu.bar.length;i ) {
strHTML = <div id= menu.bar[i].name nowrap style=left: posLeft ;top: posTop ; class=MainMenu
onmouseover=return menu_onmouseover(this,\ menu.bar[i].cmd \) onmouseout=return menu_onmouseout(this)
onclick=return menu_onclick(this,\ menu.bar[i].cmd \) title= menu.bar[i].tip > menu.bar[i].text;
if (menu.bar[i].key!=) {
strHTML = (<u> menu.bar[i].key </u>);
}
strHTML = </div>;
document.write (strHTML);
posLeft = document.all.item(menu.bar[i].name).offsetWidth 1;
}
strHTML = </div>;
document.write (strHTML);
}
//输出一个已定义的子菜单，竖排的
function popSubMenu(menu) {
var strHTML, posLeft, posTop, i;
strHTML = <div id= menu.name style=left:20;top:30;width:244;height:300; class=SubMenuBG>
document.write (strHTML);
posLeft = 1;
posTop = 1;
for (i=0;i<menu.bar.length;i ) {
if (menu.bar[i].name!=\-) { //如果名称不是“\-”，表示是一个普通菜单条
strHTML = <div id= menu.bar[i].name style=left: posLeft ;top: posTop ; class=SubMenu
title= menu.bar[i].tip
onmouseover=return bar_onmouseover(this, menu.bar[i].type ,\ menu.bar[i].cmd \)
onmouseout=return bar_onmouseout(this, menu.bar[i].type ,\ menu.bar[i].cmd \)
onclick=return bar_onclick(this, menu.bar[i].type ,\ menu.bar[i].cmd \)>
<table border=0 cellspacing=0 cellpadding=0 width=240>
<tr>
<td nowrap align=center width=20 id= menu.bar[i].name _ico class=ico>;
if (menu.bar[i].ico!=) {
strHTML = <img border=0 width=16 height=16 src= menu.bar[i].ico >;
}else {
&n
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