<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>手风琴效果</title>
<style>
body,ul,ol{margin:0;padding:0;}
li{ list-style:none;}
img{ border:none; vertical-align:top; }
#box{width:470px;height:150px; position:relative; margin:30px auto; overflow:-hidden;}
ul{ width:470px; position:absolute;left:0; top:0; z-index:1;}
ul li{width:470px; position:absolute; top:0;}
</style>
<script type="text/javascript" src="move.js"></script>
</head>
<body>
<div id="box">
<ul>
<li style="display:block"><img src="images/1.jpg" alt=""/></li>
<li><img src="images/2.jpg" alt=""/></li>
<li><img src="images/3.jpg" alt=""/></li>
<li><img src="images/4.jpg" alt=""/></li>
<li><img src="images/5.jpg" alt=""/></li>
</ul>
</div>
<script>
var oUl = document.getElementsByTagName('ul')[0];
var aLiUl = oUl.getElementsByTagName('li');
for(var i=1;i<aLiUl.length;i++){
aLiUl[i].style.left=(470-120)+(i-1)*30+'px';
}
for(var i=0;i<aLiUl.length;i++){
aLiUl[i].index=i;
aLiUl[i].onmouseover=function(){
for(var i=0;i<aLiUl.length;i++){
if(i<=this.index){
startMove(aLiUl[i],{left:i*30})
}else{
startMove(aLiUl[i],{left:(470-120)+(i-1)*30})
}
}
}
}
</script>
</body>
</html>
move.js
// JavaScript Document
function startMove(obj,json,endFn){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var bBtn = true;
for(var attr in json){
var iCur = 0;
if(attr == 'opacity'){
if(Math.round(parseFloat(getStyle(obj,attr))*100)==0){
iCur = Math.round(parseFloat(getStyle(obj,attr))*100);
}
else{
iCur = Math.round(parseFloat(getStyle(obj,attr))*100) || 100;
}
}
else{
iCur = parseInt(getStyle(obj,attr)) || 0;
}
var iSpeed = (json[attr] - iCur)/8;
iSpeed = iSpeed >0 ? Math.ceil(iSpeed) : Math.floor(iSpeed);
if(iCur!=json[attr]){
bBtn = false;
}
if(attr == 'opacity'){
obj.style.filter = 'alpha(opacity=' +(iCur + iSpeed)+ ')';
obj.style.opacity = (iCur + iSpeed)/100;
}
else{
obj.style[attr] = iCur + iSpeed + 'px';
}
}
if(bBtn){
clearInterval(obj.timer);
if(endFn){
endFn.call(obj);
}
}
},30);
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}