页面框架，去掉横的滚动条，只留竖的滚动条

代码:

    <div style="padding-top: 5px; overflow:scroll; overflow-x:hidden;" >
        <iframe id="iFrame1" name="iFrame1" scrolling="auto" frameborder="0" src='1.aspx' width="240" height="200">
        </iframe>                               
    </div>