function MenuDisplay(LeftID, RightID, MenuID, ItemID) {
    setOpacity(document.getElementById(LeftID), 75);
    setOpacity(document.getElementById(RightID), 75);
    setOpacity(document.getElementById(MenuID), 90);
    document.getElementById(ItemID).className = "ClassItemActive";
    document.getElementById(MenuID).style.visibility = "visible";
}

function MenuHide(LeftID, RightID, MenuID, ItemID) {
    document.getElementById(MenuID).style.visibility = "hidden";
    setOpacity(document.getElementById(LeftID), 100);
    setOpacity(document.getElementById(RightID), 100);
    document.getElementById(ItemID).className = "ClassItem"
}