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Javascript 簡單的Tab切換實現

程式碼:

<!DOCTYPE html>
<html>
<head>
    <title>example</title>
    <style type="text/css">
    *{
        padding: 0;
        margin: 0;
    }
    #example{
        width: 500px;
        height: 400px;
        margin: 0 auto;
    }
    #example .hd ul li{
        display: inline-block;
        width: 32%;
        height: 36px;
        line-height: 36px;
        border-radius: 5px;
        background-color: #333;
        text-align: center;
        color: #fff;
    }
    #example .hd ul li.current{
        background-color: green;
    }
    #example .bd{
        border: 1px solid #ccc;
        border-radius: 5px;
    }
    #example .bd ul li{
        display: none;
    }
    #example .bd ul li.current{
        display: block;
    }
    </style>
</head>
<body>
    <div id="example">
        <div class="hd">
            <ul>
                <li class="current">Beijing</li>
                <li>Shanghai</li>
                <li>Guangzhou</li>
            </ul>
        </div>
        <div class="bd">
            <ul>
                <li class="current">This is Beijing!</li>
                <li>This is Shanghai</li>
                <li>This is Guangzhou</li>
            </ul>
        </div>
    </div>
    <script type="text/javascript">
    var hd = document.getElementsByClassName("hd")[0].getElementsByTagName("li");
    var bd = document.getElementsByClassName("bd")[0].getElementsByTagName("li");
    for (var i = 0; i < hd.length; i++) {
        hd[i].onclick = function(){
            doTabs(this);
        }
    }
    function doTabs(obj){
        for (var i = 0; i < hd.length; i++) {
            if(hd[i]==obj){
                hd[i].className = "current";
                bd[i].className = "current";
            }else{
                hd[i].className = "";
                bd[i].className = "";
            }
        }
    }
    </script>
</body>
</html>