026-跟随鼠标的div.html

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style>
#div1{ background:red; width:100px; height:100px; position:absolute;}
</style>
<script>
/*
*/
document.onmousemove = function(ev)
{
	var oDiv1 = document.getElementById("div1");
	var oEvent = ev || event;
	var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
	var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
	oDiv1.style.left = oEvent.clientX + scrollLeft + "px";
	oDiv1.style.top = oEvent.clientY + scrollTop + "px";
}
</script>
</head>
<body style="height:2000px;">
<div id="div1"></div>
</body>
</html>