今天尝试用面向对象的方式来编写js，例子就遇到了问题。大家帮忙看看，是什么原因，谢谢了
html代码：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="backend.test.js"></script>
</head>
<body>
<a href="Javascript:void(0)" id="save">按钮</a>
</body>
</html>
backend.test.js代码
var backend = backend || {};
backend.test =
{
__Message:"点击了按钮",
_save:function(){
var test = this;
$("#save").click(function(){
alert(test.__Message);
});
}
};
