function SendMail(encAddr, subj){
   var addr = chars_from_hex(remove(encAddr, 'T'));
   var loc = 'mailto:'+ addr;
   if (subj){loc = loc + '?subject=' + subj;}
   window.location = loc;
}

function remove(s, t) {
  i = s.indexOf(t);
  r = "";
  if (i == -1) return s;
  r += s.substring(0,i) + remove(s.substring(i + t.length), t);
  return r;
}