function e(s1, s2, s3)
{
  var _m1 = "mail";
  var _m2 = "to:";
  var _m0 = _m1 + _m2 + s2 + '@' + s1;
  if(s3) _m0 = _m0 + '?subject=' + s3;
  document.location = _m0;
}