关于iframe的高度自适应问题（js）

function SetCwinHeight()
{
  var cwin=document.getElementById("cwin");
  if (document.getElementById)
  {
    if (cwin && !window.opera)
    {
　　if (cwin.contentDocument && cwin.contentDocument.body.offsetHeight)
　　　　　　cwin.height = cwin.contentDocument.body.offsetHeight;
　　else if(cwin.Document && cwin.Document.body.scrollHeight)
　　　　cwin.height = cwin.Document.body.scrollHeight;
　　}
　}
}

<iframe width="778" align="center" height="200" id="cwin" name="cwin" onload="Javascript:SetCwinHeight(this)" frameborder="0" scrolling="no"></iframe>