function addEvent (elm, evType, fn, useCapture) {
	// cross-browser event handling for IE5+, NS6+ and Mozilla/Gecko
	// By Scott Andrew
	if (elm.addEventListener) {
		elm.addEventListener(evType, fn, useCapture);
		return true;
	} else if (elm.attachEvent) {
		var r = elm.attachEvent('on' + evType, fn);
		return r;
	} else {
		elm['on' + evType] = fn;
	}
}



function updateSubmenu () {

	// go thru each submenu link;
	// if its ID (e.g., "sub_contactUs") stem matches one of the classes of the BODY tag (e.g., "aboutUs contactUs"),
	//	change the submenu link's class from "off" to "on" (to indicate that's the currently viewed page)

	if (!document.getElementsByTagName) return;
	if (!document.getElementById) return;
	
	var bodyTag = document.getElementsByTagName("body")[0];
	var submenuTD = document.getElementById("submenu");
	var submenuLinks = submenuTD.getElementsByTagName("a");

	for (var i = 0; i < submenuLinks.length; i++) {
		var thisLink = submenuLinks[i];
		var bodyClass = bodyTag.className;
		var linkIDStem = thisLink.id.slice(4);
		var re = new RegExp(linkIDStem, "g");
		if (bodyClass.match(re)) {
			thisLink.className = "on";
		}
	}
}

addEvent(window, "load", updateSubmenu, false);