var ea  = 'jyp@_dnzoaqir.ut-ehvlwgsxkcbfm';

function sm(is,subj) {
  var ss = '';
  var adr = '';

  for(ii=0;ii<is.length;ii+=2) {
    ss = is.substr(ii,2);
    adr += ea.substr(ss-1,1);
  }

  if(subj=='')
    window.open('mailto:'+adr);
  else
    window.open('mailto:'+adr+'?subject='+subj);
}