// set up browser-dependent variables
// dom is netscape 6 (and all dom-compatible)

if (document.all) {nn=0;ie=1;dom=0;fShow="visible";fHide="hidden";}
else if (document.layers) {nn=1;ie=0;dom=0;fShow="show";fHide="hide";}
else if (document.getElementById) {nn=0;ie=0;dom=1;fShow="visible";fHide="hidden";}

// last nav item that was moused over; use to detect which
// items to hideon mouseout
var current = "";

function hiLite() {
	turnedOn = eval(current + "_1");
	if (dom) {document.getElementById(current).src = turnedOn.src;}
	else if (ie) {document.images[current].src = turnedOn.src;}
	else if (nn) {document.background.document.images[current].src = turnedOn.src;}
}

function loLite() {
	turnedOff = eval(current + "_0");
	if (dom) {document.getElementById(current).src = turnedOff.src;}
	else if (ie) {document.images[current].src = turnedOff.src;}
	else if (nn) {document.background.document.images[current].src = turnedOff.src;}
}

function showSub(layer) {
	current = layer;
	layer = current + "sub";
	if (dom) {document.getElementById(layer).style.visibility = fShow;}
	else if (ie) {document.all[layer].style.visibility = fShow;}
	else if (nn) {document.layers[layer].visibility = fShow;}
}

function hideSub() {
	// only hide if var current exists
	// (created when showSub() has already been called)
	if (current) {
	layer = current + "sub";
	if (dom) {document.getElementById(layer).style.visibility = fHide;}
	else if (ie) {document.all[layer].style.visibility = fHide;}
	else if (nn) {document.layers[layer].visibility = fHide;}
	}
}