<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>多物体 透明度动画</title>
<style>
body,div{
margin: 0;
padding:0;
}
div{
width:200px;
height:200px;
margin:10px;
float: left;
background: red;
filter:alpha(opacity:30);
opacity:0.3;
}
</style>
<script>
window.onload=function(){
var oDiv=document.getElementsByTagName('div');
for(var i=0;i<oDiv.length;i++){
oDiv[i].timer=null;
oDiv[i].alpha=30;
oDiv[i].onmouseover = function(){
startMove(this,100);
};
oDiv[i].onmouseout = function(){
startMove(this,30);
}
}
};
function startMove(obj,iTarget){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var speed=0;
if(obj.alpha>iTarget){
speed=-10;
}else{
speed=10;
}
if(obj.alpha==iTarget){
clearInterval(obj.timer);
}else{
obj.alpha+=speed;
obj.style.filter='alpha(opacity:'+obj.alpha+')';
obj.style.opacity=obj.alpha/100;
}
},30)
}
</script>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>
<div id="div3"></div>
<div id="div4"></div>
</body>
</html>
