function menu_setClass(prefix, id, mode)
{
	var elt, i;

	elt = document.getElementById(prefix + id);
	i = elt.className.indexOf("_");

	if (i > 0)
		elt.className = elt.className.substr(0, i + 1) + mode;
}

function menu_OnMouseOver(id)
{
	menu_setClass("td", id, "on");
	menu_setClass("a", id, "on");
}

function menu_OnMouseOut(id)
{
	menu_setClass("td", id, "off");
	menu_setClass("a", id, "off");
}

function menu_OnClick(id)
{
	window.location = document.getElementById("a" + id).href;
}

function onclick_about(sTopic)
{
	window.open("info_" + sTopic + ".php", "about", 
		"alwaysRaised=yes,scrollbars=yes,"
		+ "width=800,height=640,"
		+ "directories=no,location=no,menubar=no,resizable=no,status=no,toolbar=no");
}

function onclick_moreInfo(sURL)
{
	window.open(sURL, "_blank", "scrollbars=yes,resizable=yes,directories=no,location=no,menubar=no,status=no,toolbar=no");
	window.close();
}