让Iframe自动适应高度，可以设置最小高度

 //让Iframe自动适应高度
 function SetWinHeight(obj)
 {
  var win=obj;
  if (document.getElementById)
  {
   if (win && !window.opera)
  {
  if (win.contentDocument && win.contentDocument.body.offsetHeight)
   {
   if(win.contentDocument.body.offsetHeight<420){
    win.height = 420;//设置最小高度
   }else{
    win.height = win.contentDocument.body.offsetHeight;
    }
   }
   else if(win.Document && win.Document.body.scrollHeight)
   win.height = win.Document.body.scrollHeight;
   }
  }
 }

 

 

html标签:

<iframe name="dtl" id="dtl" src=""  onload="Javascript:SetWinHeight(this)" height="100%" width="100%" marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="auto"></iframe>

 onload="Javascript:SetWinHeight(this)"一定要有