jquery的onclick(this)方法

​x
 
<!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 type="text/css">
.user_btn {
    
    width: 60px;
    height: 30px;
    background: #FC9;
    -moz-border-radius: 15px;
    -webkit-border-radius: 15px;
    border-radius: 15px;
    text-align: center;
}
</style>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
​
​
<script type="text/javascript">
​
function  shoucang(which){
​
    if($(which).attr("value")=="收藏")
        {
        $(which).attr("value","已收藏");
    
        }
else if($(which).attr("value")=="已收藏")
    {
    $(which).attr("value","收藏");
    }
    
​
}
</script>
​
​
</head>
​
<body>
<input name="收藏" type="button" value="收藏" class="user_btn" onclick="shoucang(this)"/>
</body>
</html>
HTML