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<!doctype html>
<html>
<head>
<meta charset = "utf-8">
<title>未命题</title>
<style>
*{margin: 0;
padding: 0;
}
#div1{
height: 100px;
width: 100px;
background: red;
margin-left: 200px;
}
</style>
<script>
window.onload = function ()
{
odiv1 = document.getElementById(‘div1‘);
odiv1.onclick = function ()
{
startMove(this,{
width:200,
height:300
}
,10)
}
function startMove (obj,json,speed)
{
clearInterval(obj.timer);
var icur = 0;
obj.timer = setInterval(function(){
var ibtn = true;
for(var attr in json)
{
var goal = json[attr];
if(attr == ‘opacity‘)
{
icur = Math.round(css(obj,‘opacity‘)*100);
}
else
{
icur = parseInt(css(obj,attr));
}
if(icur != goal)
{
ibtn = false;
if(attr == ‘opacity‘)
{
obj.style.opacity = (iCur + iSpeed) / 100;
obj.style.filter = ‘alpha(opacity=‘+ (iCur + iSpeed) +‘)‘;
}
else
{
obj.style[attr] = icur + speed + ‘px‘;
}
}
}
if(ibtn)
{
clearInterval(obj.timer);
}
},30);
}
function css(obj,attr)
{
if(obj.currentStyle)
return obj.currentStyle[attr];
else
return getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<div id="div1"></div>
</body>
</html>
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原文地址：http://www.cnblogs.com/mayufo/p/4328762.html
