link1 = '<a href="#" onclick="sendemail(1);return false;">klaus.blaum<img src="../pix/bei.gif" width="11" height="9" border="0" alt="bei">mpi-hd.mpg.de</a>';
link2 = '<a href="#" onclick="sendemail(2);return false;"><img src="../pix/linkbox/mail_gr.gif" width="15" height="15" border="0" alt="Email"></a>';
link3 = '<a href="#" onclick="sendemail(3);return false;">klaus.blaum<img src="../../pix/bei.gif" width="11" height="9" border="0" alt="bei">mpi-hd.mpg.de</a>';
link4 = '<a href="#" onclick="sendemail(4);return false;">AG Blaum</a>';

function sendemail(adrid) {
  klaffe = '@';
  switch(adrid) {
    case  1: email = 'klaus.blaum' + klaffe + 'mpi-hd.mpg.de'; break;
    case  2: email = 'klaus.blaum' + klaffe + 'mpi-hd.mpg.de'; break;
    case  3: email = 'klaus.blaum' + klaffe + 'mpi-hd.mpg.de'; break;
    case  4: email = 'klaus.blaum' + klaffe + 'mpi-hd.mpg.de'; break;
      
  }
  win = window.open('mailto:' + email);
}