function warning() {
    document.getElementById("frontforum1").style.display = "block";
    document.getElementById("frontforum1").style.visibility = "visible";
    document.getElementById("frontforum").style.zIndex = 1;
    document.getElementById("frontforum1").style.zIndex = 2;
    document.getElementById("frontforum").style.display = "none";
    document.getElementById("frontforum").style.visibility = "hidden";
}