function setnav(prefix, globalnav, sectionnav, subnav) {
	if (globalnav != "") {
		document.images[globalnav].src = "../images/mainnav_arrow_on.gif";
	}
	if (sectionnav != "") {
		document.images[sectionnav].src = "images/" + prefix + "_secnav_arrow_on.gif";
	}
	if (subnav != "") {
		document.images[subnav].src = "images/" + prefix + "_subnav_arrow_on.gif";
	}
}

function rollon(name, uplevel, pic) {
	if ((name != globalnav) && (name != sectionnav) && (name != subnav)) {
		path = "";
		for (var tmp = 1; tmp <= uplevel; tmp++) {
			path = "../" + path;
		}
		document.images[name].src = path + "images/" + pic + "_on.gif";
	}
}

function rolloff(name, uplevel, pic) {
	if ((name != globalnav) && (name != sectionnav) && (name != subnav)) {
		path = "";
		for (var tmp = 1; tmp <= uplevel; tmp++) {
			path = "../" + path;
		}
		document.images[name].src = path + "images/" + pic + "_off.gif";
	}
}