<head runat="server">
<title></title>
<style type="text/css">
div
{
width: 100px;
height: 50px;
background: #0000FF;
margin: 10px;
}
</style>
<script type="text/javascript">
window.onload = function () {
var oDiv = document.getElementsByTagName('div');
for (var i = 0; i < oDiv.length; i++) {
oDiv[i].timer = null; //给买个DIV做个标记，用以关闭相应DIV的定时器
oDiv[i].onmouseover = function () {
move(this, 400); //给定时器输出参数
}
oDiv[i].onmouseout = function () {
move(this, 100);
}
}
};
function move(div, end) {
clearInterval(div.timer);
div.timer = setInterval(function () {
var speed = (end - div.offsetWidth) / 5; //（终点-要走的宽度）/缩放系数=DIV移动的速度
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed); //小数取整，也就是进位取整
if (div.offsetWidth == end) { //当到达终点时关闭计时器
clearInterval(div.timer);
}
else {
div.style.width = div.offsetWidth + speed + 'px'; //移动DIV的宽度
}
}, 30)
}
</script>
</head>
<body>
<div>
</div>
<div>
</div>
<div>
</div>
</body>
