function check_form() {
  var error = 0;
  var error_message = "Please fill the following fields:\n\n";

  var  nume= document.forma.nume.value;
  var  email= document.forma.email.value;
  var firma = document.forma.firma.value;
  var comentarii = document.forma.comentarii.value;
  
  if (nume == "") {
    error_message = error_message + "- Name\n";
    error = 1;
  }

  if (email == "") {
    error_message = error_message + "- E-mail\n";
    error = 1;
  }

  if (firma == "") {
    error_message = error_message + "- Company\n";
    error = 1;
  }
  
  if (comentarii == "") {
    error_message = error_message + "- Comments\n";
    error = 1;
  }
  
  if (error == 1) {
    alert(error_message);
		return false;
  }
  

}