<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>任意值属性 多物体宽高</title>
<style>
ul,li{
list-style: none;
}
li{
width:200px;
height:100px;
background-color: yellow;
margin:10px;
border:4px solid #f00;
}
</style>
<script>
window.onload=function(){
var Li1 = document.getElementById('li1');
var Li2 = document.getElementById('li2');
Li1.onmouseover = function(){
startMove(Li1,'height',400);
};
Li1.onmouseout = function(){
startMove(Li1,'height',100);
};
Li2.onmouseover = function(){
startMove(Li2,'width',400);
};
Li2.onmouseout = function(){
startMove(Li2,'width',200);
}
};
function startMove(obj,attr,iTarget){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var icur = parseInt(getStyle(obj,attr));
var speed = (iTarget - icur)/8;
speed = speed >0 ? Math.ceil(speed) : Math.floor(speed);
if(icur == iTarget){
clearInterval(obj.timer);
}else{
obj.style[attr] = icur + speed + 'px';
}
},30)
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
<li id="li2"></li>
</ul>
</body>
</html>
