php - focus on dynamically generated div -

i generating div in controller dynamically .there can n number of div's.i doing ajax , in response generating div.and on keydown want focus on div.i manage keydown effect.i tried focus not working. here div generated dynamically in controller

echo '<div class="col-md-12 srch-result" style="cursor:pointer;text-indent:10px;padding:5px 0px 5px 3px" data-uid="'.$rows->user_id.'" data-uname="'.$rows->firstname." ".$rows->lastname.'">'.str_ireplace($keyword,'<b>'.$keyword.'</b>',$rows->firstname." ".$rows->lastname).'</div>' 

and code in view append result inside div

$('#page_to').keyup(function(){              var keyword = $('#page_to').val();              $.ajax({                 type:'post',                 url:'<?php echo base_url("user/userlist"); ?>',                 data:'keyword='+keyword,                 success:function(response)                 {                     $('#search-result').show();                     $('#search-result').show('1000');                     $('#search-result').html(response);                 }               });          });