<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>无标题文档</title> <style> body{margin:0; padding:0} #to_top{width:30px; height:40px; padding:20px; font:14px/20px arial; text-align:center; background:#06c; position:absolute; cursor:pointer; color:#fff} </style>
<script> window.onload = function(){ var oTop = document.getElementById("to_top"); document.onmousemove = function(evt){ var oEvent = evt || window.event; var scrollleft = document.documentElement.scrollLeft || document.body.scrollLeft; var scrolltop = document.documentElement.scrollTop || document.body.scrollTop; oTop.style.left = oEvent.clientX + scrollleft +10 +"px"; oTop.style.top = oEvent.clientY + scrolltop + 10 + "px"; } } </script>
</head> <body style="height:1000px;"> <div id="to_top">鼠标跟随</div><!--跟随鼠标的div，一定要设置position，并且position一定是absolute--> </body> </html>