function openDiv(div) {
	obj = document.getElementById(div);
	if (obj.style.visibility == "hidden") {
		obj.style.visibility = "visible";
		obj.style.height = "auto";
		obj.style.overflow = "auto";
	}
	else {
		obj.style.visibility = "hidden";
		obj.style.height = "0px";
		obj.style.overflow = "hidden";
	}
}