function showSubMenu(menu)
{
    var subMenu = document.getElementById(menu.id + "_sub");
    if (subMenu != null)
        subMenu.style.display = "block";
}

function hideSubMenu(menu)
{
    var subMenu = document.getElementById(menu.id + "_sub");
    if (subMenu != null)
        subMenu.style.display = "none";
}

function menuItemOver(event)
{
    var menuItem = event.srcElement == null ? event.target : event.srcElement;
    if (menuItem != null  && menuItem.className != "menuBar")
    {
        if (menuItem.tagName == "A")
            menuItem = menuItem.parentNode;
        menuItem.style.backgroundColor = "#f18a20";
    }
}

function menuItemOut(event)
{
    var menuItem = event.srcElement == null ? event.target : event.srcElement;
    if (menuItem != null  && menuItem.className != "menuBar")
    {
        if (menuItem.tagName == "A")
            menuItem = menuItem.parentNode;
        menuItem.style.backgroundColor = "";
    }
}

function debugOut(text)
{
    document.getElementById("logo").innerHTML = text;
}

function toggleVisibility(element)
{
    if (element.className == "invisible")
        element.className = "";
    else
        element.className = "invisible";
}