function email (target)
{
  odsylacz = 'mailto:tarabuk' + '@tarabuk.pl';

  if (target == 'bulletin')
  {
    odsylacz += "?subject=Tarabuk's Bulletin - Registration";
    odsylacz += '&body=I agree to send for my e-mail address news about events in bookshop and cafeteria Tarabuk. My e-mail address is: ';
    odsylacz += prompt ('Your e-mail address:', '');
  }

  parent.location.href = odsylacz;
}