/**
 * Verify and send contact form
 */
function sendContactForm()
{
    if(verifyContactForm()){
        sendMessage();
    }
}

/**
 * Verify contact form
 */
function verifyContactForm()
{
    if($("#contact_name").attr("value") == ''){
        alert("Enter your name");
        return false;
    }

    if($("#contact_email").attr("value") == ''){
        alert("Enter your email address");
        return false;
    }

    if(emailCheck($("#contact_email").attr("value")) == false){
        alert("Invalid email address");
        return false;
    }

    if($("#contact_message").attr("value") == ''){
        alert("Enter your message");
        return false;
    }

    return true;
}

/**
 * Send message
 */
function sendMessage()
{
    var params = '';
    params += "name=" + $("#contact_name").attr("value");
    params += "&email=" + $("#contact_email").attr("value");
    params += "&subject=" + $("#contact_subject").attr("value");
    params += "&message=" + $("#contact_message").attr("value");

    $.ajax({
            type: "POST",
            url: "tb_contact_form.php",
            data: params,
            success: function(responseText){
                if(responseText == "")
                    alert("Your message has been sent.");
                else
                    alert("Your message can't be send. Please try again.");
            }
        });
}