隐藏在左侧，鼠标点击展开CSS菜单

答案：<!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>隐藏菜单</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>  
#menuShow{  
border: 1px solid #666666;  
background-color: #EEEEEE;  
padding: 0px;  
font-size: 12px;  
font-family: tahoma;  
position: absolute;  
width: 161px;  
height: auto;  
}  

#menuSelect{  
border: 1px solid #999999;  
background-color: #cccccc;  
padding: 0px;  
font-size: 10px;  
font-family: tahoma;  
position: absolute;  
width: 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="/jscss/demoimg/200905/click1.gif" border="0"></a></div>  
<div id="menuShow" style="" align="center"> <a href="#" onClick="moveOffMenu();moveOnSelector()">   
  <img src="/jscss/demoimg/200905/click.gif" border="0">隐藏菜单</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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