function showSub() {
document.getElementById('submenu2').style.visibility = "visible";
}
function hideSub() {
document.getElementById('submenu2').style.visibility = "hidden";
}
function showContact() {
document.getElementById('contactmenu2').style.visibility = "visible";
}
function hideContact() {
document.getElementById('contactmenu2').style.visibility = "hidden";
}