function vaktaSubcatClick(box, catId) {
    if (box.checked) {
        var allChecked = true;
        for (var i = 0; i < 100; i++) {
            if ($("chkSubcat_" + catId + "_" + i)) {
                if (!$("chkSubcat_" + catId + "_" + i).checked) {
                    allChecked = false;
                    break;
                }
            }
        }
        $("chkCat_" + catId).checked = allChecked;
    } else {
        $("chkCat_" + catId).checked = false;
    }
}

function vaktaCatClick(box, catId) {
    var allChecked = true;
    for (var i = 0; i < 100; i++) {
        if ($("chkSubcat_" + catId + "_" + i)) {
            $("chkSubcat_" + catId + "_" + i).checked = box.checked;
        }
    }
}

function vaktaCheckForm()
{
    if ($("txtName").value.trim() == "") {
        alert("Vinsamlegast gefið upp nafn");
        $("txtName").focus();
        return false;
    }
    if (!isEmail($("txtEmail").value.trim())) {
        alert("Vinsamlegast gefið upp netfang");
        $("txtEmail").focus();
        return false;
    }
    return true;
}