test.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head>
<body>
<table align=center cellspacing=0 cellpadding=0 height="100%" border=0>
<tbody>
<tr>
<td valign="top" width="206" name="frametitle" id="frametitle">
<iframe style="z-index: 1; visibility: inherit; 206px;height:100%" name="leftmenu" id="leftmenu" src="nest.html" frameborder=0 scrolling="no"></iframe>
</td>
</tr>
</tbody>
</table>
</body>
</html>
<script type="text/javascript">
function TuneHeight(){
var h = document.getElementById("leftmenu").contentWindow.document.body.scrollHeight + "px";
document.getElementById("frametitle").style.height=h;
}
window.onload=TuneHeight;
</script>
nest.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script type="text/javascript">
function test(){
document.write("<span>----------------------------------</span>");
window.parent.TuneHeight();
}
setInterval(test,1000);
</script>
</head>
<body>
</body>
</html>