function Verify(f) {
	var ErrorString  = "";
    if (isBlank(f.fnom)) ErrorString += "\n - NAME: is required";
    if (isBlank(f.fape)) ErrorString += "\n - SURNAME: is required";
    if (isBlank(f.fmail)) ErrorString += "\n - E-MAIL: is required";
	else if (!isBlank(f.fmail) && testSimpleEmail(f.fmail))
		ErrorString += "\n - E-MAIL: is not valid";
    if (isSelected(f.fpais, 0)) ErrorString += "\n - COUNTRY: is required"; 
    if (isBlank(f.fmensaje)) ErrorString += "\n - QUERY: is required";

	return errorAlert(ErrorString);
}