Iframe Height

icanmakeiteasy

Hi all, how to set Iframe height dynamically??? my html code is:

function IframeHeight(frameId){
frame = document.getElementById(frameId);
framedoc = frame.contentWindow.document;
frame.height = framedoc.body.scrollHeight + 10;
}

</script>
</head>
<body>

< iframe id='myiframe' scrolling='no' width='100%' runat='server' />

</body>

</html>

now from c#

myiframe.Attributes.Add("src", "http://www.yahoo.com");
myiframe.Attributes.Add("onload", "IframeHeight('myiframe');");

in this way i am getting "Access denied" error message why???? if i set src as my local projects page its working fine.... htlp me frnds how to set other website url as myiframe source thanks in advance

icanmakeiteasy