function hideGames() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('gamesSelect').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.gamesSelect.visibility = 'hidden';
}
else { // IE 4
document.all.gamesSelect.style.visibility = 'hidden';
}
}
}

function showGames() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('gamesSelect').style.visibility = 'visible';
}
else {
if (document.layers) { // Netscape 4
document.gamesSelect.visibility = 'visible';
}
else { // IE 4
document.all.gamesSelect.style.visibility = 'visible';
}
}
}


function hideSystems() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('systemsSelect').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.systemsSelect.visibility = 'hidden';
}
else { // IE 4
document.all.systemsSelect.style.visibility = 'hidden';
}
}
}

function showSystems() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('systemsSelect').style.visibility = 'visible';
}
else {
if (document.layers) { // Netscape 4
document.systemsSelect.visibility = 'visible';
}
else { // IE 4
document.all.systemsSelect.style.visibility = 'visible';
}
}
}


function hideMarkets() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('marketsSelect').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.marketsSelect.visibility = 'hidden';
}
else { // IE 4
document.all.marketsSelect.style.visibility = 'hidden';
}
}
}

function showMarkets() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('marketsSelect').style.visibility = 'visible';
}
else {
if (document.layers) { // Netscape 4
document.marketsSelect.visibility = 'visible';
}
else { // IE 4
document.all.marketsSelect.style.visibility = 'visible';
}
}
}


function hideCompany() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('companySelect').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.companySelect.visibility = 'hidden';
}
else { // IE 4
document.all.companySelect.style.visibility = 'hidden';
}
}
}

function showCompany() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('companySelect').style.visibility = 'visible';
}
else {
if (document.layers) { // Netscape 4
document.companySelect.visibility = 'visible';
}
else { // IE 4
document.all.companySelect.style.visibility = 'visible';
}
}
}


function hideSupport() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('supportSelect').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.supportSelect.visibility = 'hidden';
}
else { // IE 4
document.all.supportSelect.style.visibility = 'hidden';
}
}
}

function showSupport() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('supportSelect').style.visibility = 'visible';
}
else {
if (document.layers) { // Netscape 4
document.supportSelect.visibility = 'visible';
}
else { // IE 4
document.all.supportSelect.style.visibility = 'visible';
}
}
}