代码如下 ：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>52-多物体同时运动</title>
<style>
*{
margin: 0;
padding: 0;
}
div{
width: 100px;
height: 50px;
background-color: red;
margin-top: 20px;
}
</style>
<script>
window.onload=function()
{
var aDiv=document.getElementsByTagName('div');
for(var i=0;i<aDiv.length;i++)
{
aDiv[i].timer='null';//定义多个div的定时器
aDiv[i].onmousemover=function()
{
startMove(this, 400);
};
aDiv[i].onmouseout=function()
{
startMove(this, 100);
};
}
};
function startMove(obj,iTarget)
{
clearInterval(obj.timer);
obj.timer=setInterval(function()
{
var speed=(iTarget-obj.offsetWidth)/6;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(obj.offsetWidth==iTarget)
{
clearInterval(obj.timer);
}
else
{
obj.style.width=obj.offsetWidth+speed+'px';
}
},30);
}
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>
