var activeSubmenu = null;
var rollbackMenu = null;
var timeOut = "";

if (window.attachEvent) {
    window.attachEvent("onload", InitNavigation);
}
else {
    window.addEventListener("load", InitNavigation, false);
}

function mainmenuMouseOver(submenuName) {
    clearMouseOutTimer();
    if (activeSubmenu != null) {
        if (activeSubmenu.length > 0) {
            document.getElementById(activeSubmenu).style.display = "none";
        }
    }
    if (submenuName != null) {

        if (submenuName.toString().length > 0 && document.getElementById(submenuName) != undefined) {
            document.getElementById(submenuName).style.display = "block";
            activeSubmenu = submenuName;
        }
    }
}

function menuMouseOut() {
    if (rollbackMenu != null && document.getElementById(rollbackMenu) != null) {
        if (document.getElementById(activeSubmenu) != null) {
            document.getElementById(activeSubmenu).style.display = "none";
        }
        document.getElementById(rollbackMenu).style.display = "block";
        activeSubmenu = rollbackMenu;
    }
}
function clearMouseOutTimer() {
    if (timeOut != null) {
        clearTimeout(timeOut);
    }
}
function submenuMouseOver() {
    clearMouseOutTimer();
}

function startMouseOutTimer() {
    timeOut = setTimeout(menuMouseOut, 400);
}

function InitNavigation() {
    menuMouseOut();
}