<script type="text/javascript">
function calcHeight() {
//find the height of the internal page
var the_height= document.getElementById('the_iframe').contentWindow. document.body.scrollHeight;
//change the height of the iframe
document.getElementById('the_iframe').height= the_height; top.location.href = "#";
}
</script>
<iframe id="the_iframe" src="url" frameborder="0" width="100%" marginwidth="0" marginheight="0" scrolling="no" style="border: 0px" onload="calcHeight(),window.scrollTo(0,0)" height="1"></iframe>