function display_email(id) {
  document.write('<a href="JavaScript:make_email(\'' + id + '\')">' + compose_email_address(id) + '</a>');
}

function make_email(id) {

  var mail_link="mailto:";

  window.open(mail_link + compose_email_address(id));

}


function compose_email_address(id) {

  var apestaart="@";

  switch (id) {
  
    case "bisschop":
      var name="piramide.bisschop";
      var domein="pcou.nl";
      return(name + apestaart + domein);
      break
    case "maasdijk":
      var name="piramide.maasdijk";
      var domein="pcou.nl";
      return(name + apestaart + domein);
      break
    case "plesman":
      var name="piramide.plesman";
      var domein="pcou.nl";
      return(name + apestaart + domein);
      break
    case "4":

      break
    case "5":

      break
    case "6":

      break
    default:


  }
}