让div只显示横向滚动条的实例

<div style="width:50px;height:20px;overflow-x:auto;overflow-y:hidden;">
    <div style="width:9999px;">
        <div>
            <img src='#'" />             <span>图1</span>
        </div>
        <div>
            <img src='#'" />             <span>图1</span>
        </div>
        <div>
            <img src='#'" />             <span>图1</span>
        </div>
        <div>
            <img src='#'" />             <span>图1</span>
        </div>

    </div>
<div>