iframe的显示和隐藏

    <div >
      <iframe ></iframe>
     </div>
    
    <div onclick="document.all.bodyframe.style.visibility='visible'" style="background-color: red; cursor: hand; height: 22; left: 100; position: absolute; top: 137; width: 74; z-index: 1">
显示iFrame
</div>
<div onclick="document.all.bodyframe.style.visibility='hidden'" style="background-color: red; cursor: hand; height: 22; left: 161px; position: absolute; top: 83px; width: 74; z-index: 2">
隐藏iFrame
</div>