jquery 点击切换值

<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="jquery-1.8.3.min.js"></script>
        <style>
            .show_div {
                background: red;
                color: #fff;
                200px;
                height: 200px;
                line-height: 200px;
                text-align: center;
            }
            .show_div1 {
                background: blue;
                color: #fff;
                200px;
                height: 200px;
                line-height: 200px;
                text-align: center;
            }
        </style>
    </head>

    <body>
        <div class="show_div">我要点击</div>
        <input type="button" );
      });
    });
</script>
    </body>
 
</html>