var timeout = 1000;
var closetimer = 0;

function changeTab(obj, className, zindex) {
    obj.className = className;
    obj.style.zIndex = zindex;
}

function showSubmenu(nr) {
    var max_subs = 6;
    for (i = 0; i <= max_subs; i++) {
        if (document.getElementById("submenu_" + i) != null) {
            if (i == nr) {
                document.getElementById("submenu_" + i).style.display = '';
            }
            else {
                document.getElementById("submenu_" + i).style.display = 'none';
            }
        }
    }
}

function restoreActiveTimer() {
    closetimer = window.setTimeout(restoreActive, timeout);
}

function cancelRestoreActive() {
    if (closetimer) {
        window.clearTimeout(closetimer);
        closetimer = null;
    }
}



function addFavorite(title) {
    //pas de twee variabelen aan met de informatie van je eigen site
    var bookmarkurl = document.URL;
    var bookmarktitel = title + ' - ' + document.title;
    if (document.all) {
        window.external.AddFavorite(bookmarkurl, bookmarktitel);
    }
}

function textLimit(field, maxlen, message) {
    if (field.value.length > maxlen + 1)
        alert(message);
    if (field.value.length > maxlen)
        field.value = field.value.substring(0, maxlen);
}