function calcHeight_main() {
// 	document.getElementById('mainframe').contentWindow.document.body.style.padding = "50px";

	//find the height of the internal page
	var main_height = document.getElementById("mainframe").contentWindow.document.body.scrollHeight;

	//change the height of the iframe
	document.getElementById("mainframe").height = main_height + 25;
}

function calcHeight_left() {
	//find the height of the internal page
	var left_height = document.getElementById("leftframe").contentWindow.document.body.scrollHeight;

	//change the height of the iframe
	document.getElementById("leftframe").height = left_height + 25;
}