$('.contact-form .btn').on('click', function() {
    var name = $('.name').val();
    var email = $('.email').val();
    var message = $('.message').val();
    
    if(!name || !email || !message) {
        alert("All fields must be filled out");
        return false;
    } else {
        $.ajax({
            type: "POST",
            url: "https://www.example.com/contact-form",
            data: { name, email, message },
            success: function(response) {
                alert("Message sent successfully!");
            },
            error: function() {
                alert("Error sending message. Please try again.");
            }
        });
        return false;
    }
});