function chkScrollHeight(obj){
	aID = obj.id;
	// if contentDocument exists, W3C compliant (Mozilla)
	if (document.getElementById(aID).contentDocument){
	obj.style.height = document.getElementById(aID).contentDocument.body.scrollHeight;
	}
	else {
	// IE
	obj.style.height = document.frames(aID).document.body.scrollHeight;
	// alert(document.frames(aID).document.body.scrollHeight);
	}
}