x
 
<html>
<body>
<h3>iframe 中始终显示滚动条:</h3>
<iframe src ="/index.html" width="200" height="200" scrolling="yes">
  <p>Your browser does not support iframes.</p>
</iframe>
<h3>iframe 中从不显示滚动条:</h3>
<iframe src ="/index.html" width="200" height="200" scrolling="no">
  <p>Your browser does not support iframes.</p>
</iframe>
</body>
</html>