var label_send_required_fields = "Please fill in the following fields:";
var label_send_valid_email = "Please fill in a valid e-mail address:";
var lbl_send_email = "E-mail sender";
var lbl_send_emailOntvanger = "E-mail receiver";
var lbl_send_naam = "Name sender";
var lbl_send_naamOntvanger = "Name receiver";