<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>速度动画效果</title>
<style type="text/css">
*{
margin:0px;
padding: 0px;
}
#hide{
height: 200px;
width: 200px;
background-color: red;
filter:alpha(opacity=30);
opacity: 0.3;
}
</style>
</head>
<body>
<div id="hide">
</div>
<script type="text/javascript">
var hideDiv=document.getElementById('hide');
window.onload=function(){
hideDiv.onmousever=function(){
startMove(100);
}
hideDiv.onmouseout=function(){
startMove(30);
}
var timer=null;
var alphaa=30;
function startMove(iTarget) {
var hideDiv=document.getElementById('hideDiv');
clearInterval(timer);
timer=setInterval(function(){
var speed=0;
if (alphaa>iTarget) {
speed=-10;
}
else{
speed=10;
}
if (alphaa==iTarget) {
clearInterval(timer);
}
else{
alphaa+=speed;
hideDiv.style.filter="alpha(opacity："+alphaa+")";
hideDiv.style.opacity=alphaa/100;
}
},30)
}
}
</script>
</body>
</html>
