iframe 自适应高度

<script type="text/javascript">
function reinitIframe(){
	var iframe = document.getElementById("info");
	try{

	var bHeight = iframe.contentWindow.document.body.scrollHeight;

	var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;

	var height = Math.max(bHeight, dHeight-10);

	iframe.height =  height;

	}catch (ex){}

	}
	window.setInterval("reinitIframe()", 10);
</script>