<!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>
div{200px; height:200px; margin:20px; float:left; background:red; filter:alpha(opacity:30); opacity:0.3;}
</style>
<script>
window.onload=function()
{
var aDiv=document.getElementsByTagName('div');
for(var i=0;i<aDiv.length;i++)
{
aDiv[i].timer;
aDiv[i].alpha=30;
aDiv[i].onmouseover=function()
{
onmove(this,100);
}
aDiv[i].onmouseout=function()
{
onmove(this,30);
}
}
}
function onmove(obj,iTarget)
{
clearInterval(obj.timer);
obj.timer=setInterval(function()
{
var speed=(iTarget-obj.alpha)/6;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(obj.alpha==iTarget)
{
clearInterval(obj.timer);
}
else
{
obj.alpha+=speed;
obj.style.filter='alpha(opactiy:'+obj.alpha+')';
obj.style.opacity=obj.alpha/100;
}
},30);
}
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>