function insertEmail(cssid) {
  var name = "h.m.geurts";
  var domain = "uva.nl";
  document.write('<a href=\"mailto:' + name + '@' + domain + '\" id=\"' + cssid + '\">');
  document.write(name + '@' + domain + '</a>');
  
  document.write('&nbsp;<img src="./images/envelope.bmp">');  
}