<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
img {
position: absolute;
}
</style>
</head>
<body>
<img src="images/tianshi.gif" id="im" alt="" />
<script src="js/common.js"></script>
<script>
document.documentElement.onmousemove=function(e){
//console.log(e);
//利用clientX和clientY来设置图片的位置也就是鼠标的位置
my$('im').style.left=e.clientX-40+'px';
my$('im').style.top=e.clientY-40+'px';
};
</script>
</body>
</html>
最终效果如上图，图片可以在页面随着鼠标自由移动。
