var f;

function calcHeight(frame)
{
	f = frame;
	try {
		// find the height of the internal page
		var the_height = frame.contentWindow.document.body.scrollHeight;

		// change the height of the iframe
		frame.style.height = (the_height + 50) + "px";

		setTimeout( "calcHeight(f);", 1000 );
	}
	catch(err)
	{ }
}