代码简介：
平时隐藏在左侧的CSS动感菜单，像很多导航菜单一样，不点击的时候隐藏在网页左侧，鼠标放上后自动展开，本款是鼠标点击后才激活，然后动画出现，个人感觉比鼠标放上就触发的要好一点，这样更符合浏览者的意愿。
代码内容：
<!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>
<title>隐藏于网页左侧，鼠标单击展开的CSS菜单代码_网页代码站(www.webdm.cn)</title>
<style>
#menuShow{
border: 1px solid #666666;
background-color: #EEEEEE;
padding: 0px;
font-size: 12px;
font-family: tahoma;
position: absolute;
161px;
height: auto;
}
#menuSelect{
border: 1px solid #999999;
background-color: #cccccc;
padding: 0px;
font-size: 10px;
font-family: tahoma;
position: absolute;
161px;
}
a { font-family: "tahoma"; font-size: 12px; line-height: 23px; color: #555555; text-decoration: none}
a:hover {color: #0066CC; text-decoration: none}
</style>
</head>
<body>
<body bgcolor="#FFFFFF" text="#000000">
<div id="menuSelect" style=""> <a href="#" onClick="moveOnMenu();moveOffSelector()">
<img src="http://www.webdm.cn/images/20090918/click1.gif" border="0"></a></div>
<div id="menuShow" style="" align="center"> <a href="#" onClick="moveOffMenu();moveOnSelector()">
<img src="http://www.webdm.cn/images/20090918/click.gif" border="0"></a> <br>
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</div>
<SCRIPT LANGUAGE="JavaScript">
Show ="no";
var OffX = -200;
var PosX = 10;
var PosY = 10;
var speed = 5;
var increment = 5;
var incrementNS4 = 5;
var is_NS = navigator.appName=="Netscape";
var is_Ver = parseInt(navigator.appVersion);
var is_NS4 = is_NS&&is_Ver>=4&&is_Ver<5;
var is_NS5up = is_NS&&is_Ver>=5;
var MenuX = OffX;
var SelX = PosX;
var sPosX = PosX;
var sOffX = OffX;
if (Show == "yes") {
sPosX = OffX;
sOffX = PosX;
MenuX = sOffX;
SelX = sPosX;
}
if (is_NS4) {
increment = incrementNS4;
Lq = "document.layers.";
Sq = "";
eval(Lq+'menuSelect'+Sq+'.left=sPosX');
eval(Lq+'menuShow'+Sq+'.left=sOffX');
eval(Lq+'menuSelect'+Sq+'.top=PosY');
eval(Lq+'menuShow'+Sq+'.top=PosY');
} else {
Lq = "document.all.";
Sq = ".style";
document.getElementById('menuSelect').style.left = sPosX+"px";
document.getElementById('menuShow').style.left = sOffX+"px";
document.getElementById('menuSelect').style.top = PosY+"px";
document.getElementById('menuShow').style.top = PosY+"px";
}
function moveOnMenu() {
if (MenuX < PosX) {
MenuX = MenuX + increment;
if (is_NS5up) {
document.getElementById('menuShow').style.left = MenuX+"px";
} else {
eval(Lq+'menuShow'+Sq+'.left=MenuX');
}
setTimeout('moveOnMenu()',speed);
}
}
function moveOffMenu() {
if (MenuX > OffX) {
MenuX = MenuX - increment;
if (is_NS5up) {
document.getElementById('menuShow').style.left = MenuX+"px";
} else {
eval(Lq+'menuShow'+Sq+'.left=MenuX');
}
setTimeout('moveOffMenu()',speed);
}
}
function moveOffSelector() {
if (SelX > OffX) {
SelX = SelX - increment;
if (is_NS5up) {
document.getElementById('menuSelect').style.left = SelX+"px";
} else {
eval(Lq+'menuSelect'+Sq+'.left=SelX');
}
setTimeout('moveOffSelector()',speed);
}
}
function moveOnSelector() {
if (SelX < PosX) {
SelX = SelX + increment;
if (is_NS5up) {
document.getElementById('menuSelect').style.left = SelX+"px";
} else {
eval(Lq+'menuSelect'+Sq+'.left=SelX');
}
setTimeout('moveOnSelector()',speed);
}
}
</script>
</body>
</html>
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代码来自：http://www.webdm.cn/webcode/eff38085-5f90-413d-b6c9-5d3bbfdc1cd7.html