$(document).ready(function(){
    var form = $("#contact .graybox form");
    var name = $("#contact .graybox form input[name='name']");
    var surname = $("#contact .graybox form input[name='surname']");
    var email = $("#contact .graybox form input[name='addr']");
    var text = $("#contact .graybox form textarea[name='text']");
    var error = '';
    
    form.submit(function(){
        if (name.val() == '') {
            error += " - "+ _lang.name +"\n";
        }
        if (surname.val() == '') {
            error += " - "+ _lang.surname +"\n";
        }
        if (email.val() == '') {
            error += " - "+ _lang.email +"\n";
        }
        if (text.val() == '') {
            error += " - "+ _lang.message +"";
        }
        
        if (error != '') {
            alert(_lang.contactError +":\n\n"+ error);
            error = '';
            
            return false;
        }
        
        return true;
    });
})