if ( ! jQuery) {
    var $ = jQuery.noConflict();
} else {
    var $ = jQuery;
}

$(document).ready(function() {
    $("form").submit(function() {
        if (
        $("#user_name").val() == "" ||
        $("#user_email").val() == "" ||
        $("#dreamit_firstname").val() == "" ||
        $("#dreamit_lastname").val() == "" ||
        $("input[@name='dreamit_gender']:checked").val() === undefined) {
            $("#dreamit_message").text("Please complete all fields...").show().fadeOut(1500);
            return false;
        }
        return true;
    });
});