In quel div apri le pop-up

[Xinod]

oppure aggiungi nell' head

window.onload=function(){
  var lnks=document.getElementById('foto').getElementsByTagName('a');

  function keepRef(obj,k){
    obj.openpop=function(){
      window.open(obj.href,'pop_'+k,'width=200,height=200');
      return false;
    }
  }

  for(var k=0;k<lnks.length;k++){
    lnk=lnks[k];
    keepRef(lnks[k],k);
    lnks[k].onclick=lnks[k].openpop;
  }
}

o cmq, se non vuoi richiamarlo onload, ma puoi inserire uno script nel body, dopo la chiusura del div foto, aggiungi

<script type="text/javascript">
  var lnks=document.getElementById('foto').getElementsByTagName('a');

  function keepRef(obj,k){
    obj.openpop=function(){
      window.open(obj.href,'pop_'+k,'width=200,height=200');
      return false;
    }
  }

  for(var k=0;k<lnks.length;k++){
    lnk=lnks[k];
    keepRef(lnks[k],k);
    lnks[k].onclick=lnks[k].openpop;
  }
</script>

ciao