Js binds the corresponding div code block through the bind method - Codes Helper

Click div to switch the display style

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these two pieces of div are bound through the bind method, and the related code

< html xmlns= " http://www.w3.org/1999/xhtml&.;>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }

        body {
            font: 12px/19px Arial, Helvetica, sans-serif;
            color: -sharp666;
        }

        .tab {
            width: 240px;
            margin: 50px;
        }

        .tab_menu {
            clear: both;
        }

        .tab_menu li {
            float: left;
            text-align: center;
            cursor: pointer;
            list-style: none;
            padding: 1px 6px;
            margin-right: 4px;
            background: -sharpF1F1F1;
            border: 1px solid -sharp898989;
            border-bottom: none;
        }

        .tab_menu li.hover {
            background: -sharpDFDFDF;
        }

        .tab_menu li.selected {
            color: -sharpFFF;
            background: -sharp6D84B4;
        }

        .tab_box {
            clear: both;
            border: 1px solid -sharp898989;
            height: 100px;
        }

        .hide {
            display: none
        }
    </style>
    <!--   jQuery -->
    <script src="http://apps.bdimg.com/libs/jquery/1.6.4/jquery.js" type="text/javascript"></script>
    <script type="text/javascript">
        //<![CDATA[
        $(function() {
            var $div_li = $("div.tab_menu ul li");
            $div_li.click(function() {
                $(this).addClass("selected") //<li>
                    .siblings().removeClass("selected"); //<li>
                var index = $div_li.index(this); // <li>  li
                $("div.tab_box > div") //div 
                    .eq(index).show() // <li><div>
                    .siblings().hide(); //<div>
            }).hover(function() {
                $(this).addClass("hover");
            }, function() {
                $(this).removeClass("hover");
            })
        })
        //]]>
    </script>
</head>
<body>

    <div class="tab">
        <div class="tab_menu">
            <ul>
                <li class="selected"></li>
                <li></li>

            </ul>
        </div>
        <!--bind  -->
        <div> </div>
        <!-- end-->

        <!--ajax,-->
        <div class="tab_box">
            <div></div>
            <div class="hide"></div>

        </div>
    </div>

</body>

< / html >

how should I write it