简短Javascript代码实现滑动菜单效果-白红宇

　整个javascript代码共42行，其中主要函数Slide代码26行,可以改进哦！

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<style>

a,body,div,h1,h2,li,ul{

margin:0;

padding:0

}

a{display:block;text-decoration:none;height:25px;color:#456;background-color:#ABC;cursor:pointer;}

a:hover{color:#123;background-color:#789;font-weight:bold;}

body{

font:12px/18px "Times New Roman",Times,"宋体",serif;

text-align:center;

}

h1{

height:100px;

width:25px;

position:absolute;

top:-1px;

left:123px;

cursor:pointer;

color:#89A;

font-size:18px;

line-height:50px;

background-color:#234;

}

h2{

height:24px;

font-size:12px;

border-bottom:1px solid #4C6CB9;

color:#BBB;

font-weight:600;

cursor:pointer;

}

li{height:25px;list-style:none}

#Container{width:800px;background-color:#DDD;border: 1px solid #999;margin:10px auto}

#Top{height:30px;background-color:#DDD;border: 1px solid #999;}

#Logo{height:100px;background-color:#DDD;border: 1px solid #999;}

#Nav{height:30px;background-color:#DDD;border: 1px solid #999;}

#SideBar{

position:fixed!important;

position:absolute;

top:200px;

left:0px;

}

#SideBar a,#SideBar h2,#SideBar li,#SideBar ul{width:120px}

#Main{height:800px;background-color:#DDD;border: 1px solid #999;}

#Footer{height:60px;background-color:#DDD;border: 1px solid #999;}

.Extracted{width:0px;}

.Extrended{border:1px solid #555;background-color:#000;padding:1px}

</style>

</head>

<body>

<div id="Top">顶条

<div id="Logo">Logo

<div id="Nav">导航条

<div id="SideBar" class="Extrended"> <h1>菜单</h1> <ul> <h2>功能栏1</h2> <li><a href="">功能1</li> <li><a href="">功能2</li> <li><a href="">功能3</li> <li><a href="">功能4</li> <li><a href="">功能5</li> </ul> <ul> <h2>功能栏2</h2> <li><a href="www.huiyi8.com">功能1</li> <li><a href="www.enterdesk.com">功能2</li> <li><a href="www.bizhizu.cn">功能3</li> <li><a href="www.679.com">功能4</li> <li><a href="www.enterdesk.org">功能5</li> </ul> <ul> <h2>功能栏3</h2> <li><a href="">功能1</li> <li><a href="">功能2</li> <li><a href="">功能3</li> <li><a href="">功能4</li> <li><a href="">功能5</li> </ul> <ul> <h2>功能栏4</h2> <li><a href="">功能1</li> <li><a href="">功能2</li> <li><a href="">功能3</li> <li><a href="">功能4</li> <li><a href="">功能5</li> </ul> <ul> <h2>功能栏5</h2> <li><a href="">功能1</li> <li><a href="">功能2</li> <li><a href="">功能3</li> <li><a href="">功能4</li> <li><a href="">功能5</li> </ul> <ul> <h2>功能栏6</h2> <li><a href="">功能1</li> <li><a href="">功能2</li> <li><a href="">功能3</li> <li><a href="">功能4</li> <li><a href="">功能5</li> </ul><div id="Main">内容区<div id="Footer">底条<script type="text/javascript"> function $(e){return document.getElementById(e)} function Slide(Element,Mod){ var LongthMax,LongthMin,Property,Count=25,Accum,ID,Dlt,DltDlt; if(Mod){ Property='left'; LongthMax=0; LongthMin=-124; } else{ Property='height'; LongthMax=Element.children.length*25; LongthMin=25; } DltDlt=(LongthMax-LongthMin)/(Count*5); if(Element.style[Property]==LongthMax+'px')DltDlt=-DltDlt; Accum=parseInt(Element.style[Property]); Dlt=7*DltDlt; ID=setInterval(function(){ if(Count--){ if(!(Count%5))Dlt-=DltDlt; Accum+=Dlt; Element.style[Property]=Math.floor(Accum)+'px'; return } clearInterval(ID); Element.style[Property]=(DltDlt>0)? LongthMax+'px':LongthMin+'px'; },20); } $('SideBar').style.left='0px'; $('SideBar').children[0].οnclick=function(){ Slide(this.parentNode,1); }; (function(Menu,i,tmp){ Menu=document.getElementsByTagName('ul'); for(i=Menu.length;i--;){ tmp=Menu[i]; tmp.style.overflow='hidden'; tmp.style.height='25px'; tmp.children[0].οnclick=function(){ Slide(this.parentNode,0); }; } }()); </script> </body> </html>

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