function DisableBanner(width) {
    var banner = document.getElementById('advertRight');
    if (banner != null) {
        if (screen.width < width) {
            banner.style.display = "none";
        } else {
            banner.style.display = "";
        }
    }
}

function TextAreaMaxLength(textArea, max) {
    if (textArea.value.length > max) {
        textArea.value = textArea.value.substring(0, max);
    }
}