iframe高度自适应

function reinitIframe(fr){
var iframe = document.getElementById(fr);
try{
var bHeight = iframe.contentWindow.document.body.scrollHeight;
var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;
var height = Math.max(bHeight, dHeight);
iframe.height = height;
}catch (ex){}
}

<iframe id="the2" src="../living.html" width="640" height="100%" style="overflow-y: scroll" frameborder="0" scrolling="Auto"></iframe>
<script type="text/javascript">
window.setInterval("reinitIframe('the2')", 200);
</script>