function checkform(formObj) {
    to_check = ["nom","prenom","adresse","tel","message"];
    for (var i=0; i<formObj.elements.length; i++) {
        if (to_check.contains(formObj.elements[i].name)) {
            if(formObj.elements[i].value.length <= 2)
                return false;
            to_check.removeAt(i);
        }
    }
    return true;
}

function preloadImages(images) {
    for (var i in images) {
        im = new Image();
        im.src = images[i].toString();
    }
}