<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
#gun{
width:200px;
height:100px;
background:red;
position:absolute;
left:0;
}
</style>
</head>
<body>
<a id="btn" href="javascript:void(0);" />点击向右移动</a>
<div id="gun"></div>
<script>
window.onload=function(){
var gun=document.getElementById("gun");
var btn=document.getElementById("btn");
btn.onclick=function(){
gun.style.left=gun.offsetLeft+5+'px';
};
};
</script>
</body>
</html>