function ValidateForm() {
    if (typeof (Page_ClientValidate) == 'function') {
        Page_ClientValidate();
    }
    if (Page_IsValid) {
        $('.error-message-container').hide();
    } else {
        $('.error-message-container').show();
    }
}
function change (el) {
    var max_len = 499;
    if (el.value.length > max_len) {
        el.value = el.value.substr(0, max_len);
    }

    return true;
}