var menus = new Object();
var count = 0;

function ShowMenu(id) {
    if(menus[id] == null) {
        menus[id] = document.getElementById(id);
    }
    for(var i in menus)
    {
        menus[i].style.display = "none";
    }
    if(menus[id].innerHTML != "") {
        menus[id].style.display = "block";
        menus[id].style.zIndex = 10;
    }
    count = 0;
}

function HideMenus() {
    count++;
    if(count > 5) {
        for(var i in menus)
        {
            menus[i].style.display = "none";
        }
    }
}