<!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>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<meta name="author" content="" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<link rel="stylesheet" type="text/css" href="" />
<style type="text/css"></style>
<script type="text/javascript">
function change_pic(){
var imgObj = document.getElementById("caocao_pic");
var Flag=(imgObj.getAttribute("src",2)=="images/1.png")
imgObj.src=Flag?"images/2.png":"images/1.png";
}
</script>
</head>
<body>
<img src="images/1.png" id="caocao_pic" onClick="change_pic()">
</body>
</html>