iframe自适应高度

方法一：

<script type="text/javascript" language="javascript"> 
   function iFrameHeight() { 
   var ifm= document.getElementById("iframepage"); 
var subWeb = document.frames ? document.frames["iframepage"].document : ifm.contentDocument; 
if(ifm != null && subWeb != null) {ifm.height = subWeb.body.scrollHeight;} 
   } 
</script>

<iframe id="iframepage" src="index.jsp"  frameborder="0" width="100%" name="iframepage" scrolling="no" onLoad="iFrameHeight()"></iframe>

方法二：

<script language="javascript" type="text/javascript"> 

function dyniframesize(down) { 
var pTar = null; 
if (document.getElementById){ 
pTar = document.getElementById(down); 
} 
else{ 
eval('pTar = ' + down + ';'); 
} 
if (pTar && !window.opera){ 
//begin resizing iframe 
pTar.style.display="block" 
if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight){ 
//ns6 syntax 
pTar.height = pTar.contentDocument.body.offsetHeight +20; 
pTar.width = pTar.contentDocument.body.scrollWidth+20; 
} 
else if (pTar.Document && pTar.Document.body.scrollHeight){ 
//ie5+ syntax 
pTar.height = pTar.Document.body.scrollHeight; 
pTar.width = pTar.Document.body.scrollWidth; 
} 
} 
} 
</script>
<table>
    <tbody>
        <tr>
            <td><iframe id="ifm" marginheight="0" src="index01.jsp" frameborder="0" allowtransparency="allowtransparency" name="ifm" marginwidth="0" scrolling="none" onload="javascript:dyniframesize('ifm');" style="min-height: 400px; width: 700px"></iframe></td>
        </tr>
    </tbody>
</table>