<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>透明度动画</title>
<style type="text/css">
.div{
width: 300px;
height: 300px;
background-color: blue;
opacity: 0.5;
}
</style>
<script type="text/javascript">
window.onload=function(){
var div = document.getElementById("div")
div.onmouseover=function(){
startMove(1);
}
div.onmouseout=function(){
startMove(0.5);
}
}
var timer;
var opacity=0.5;
function startMove(itarget){
clearInterval(timer)
var div = document.getElementById("div")
timer = setInterval(function(){
var speed = 0;
if ( div.style.opacity>itarget){
speed=-0.5;
}else {
speed=0.5;
}
if(opacity==itarget){
clearInterval(timer)
}else {
opacity +=speed;
div.style.opacity=opacity;
}
},30)
}
</script>
</head>
<body>
<div class="div"></div>
</body>
</html>木子舟义
相关分类