function checkform(feedback)
  {
    if(feedback.forename.value=="")
    {
      alert ("Please enter your first name")
      feedback.forename.focus()
      return false;
    }
    if(feedback.surname.value=="")
    {
      alert ("Please enter your last name")
      feedback.surname.focus()
      return false;
    }
    if(feedback.email.value=="")
    {
      alert ("Please enter your email")
      feedback.email.focus()
      return false;
    }
    if(feedback.comments.value=="")
    {
      alert ("Please enter your comments")
      feedback.comments.focus()
      return false;
    }
    return true;
  }