<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{margin:0;padding:0;}
ul li{width:200px;
height:100px;
background:yellow;
margin-bottom:20px;
border:4px solid black;
filter:alpha(opacity);
opacity:0.3;
}
ul,li{list-style:none;}
</style>
<script type="text/javascript"">
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle;
}
else{
return getComputedStyle(obj,false)[attr];
}
}
function startMove(obj,attr,target,fn){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
//取当前的值
var icur=0;
if(attr=='opacity'){
icur=Math.round(parseFloat(getStyle(obj,attr))*100);
}
else{
icur=parseInt(getStyle(obj,attr));
}
//算速度
var speed=(target-icur)/8;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
//检测停止
if(icur==target){
clearInterval(obj.timer);
if(fn){
fn();
}
}else{
if(attr=='opacity'){
obj.style.filter='alpha(opacity:'+
(icur+speed)+')';
obj.style.opacity=(icur+speed)/100;
}else{
obj.style[attr]=icur+speed+'px';
}
}
},30);
}
window.onload=function(){
var li=document.getElementById("li1");
li.onmouseover=function(){
startMove(li,'width',400,function(){
alert(1);
});
}
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
</ul>
</body>
</html>
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习惯受伤
慕的地6079101
qq_果汁分ni半_03462240
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