function ValidateContactForm() {
    var missinginfo = "";
    if (document.getElementById("contact_name").value == "") {
        missinginfo += "\n - Full name";
    }
    if (document.getElementById("contact_email").value == "") {
        missinginfo += "\n - E-mail";
    }
    if (document.getElementById("contact_message").value == "") {
        missinginfo += "\n - Message";
    }
   
    if (missinginfo != "") {
        missinginfo ="Following fields are required:" + missinginfo;
        alert(missinginfo);
        return false;
    }
    else {
        return true;
    }
}