IN PAGE
<script type="text/javascript">


$(document).ready(function() {
loadRankDetails();
  });


</script>

IN APPLICATION.JS

function loadRankDetails() {
    var formNode = document.getElementById("bulk_edit_ranks_form");


    //$.ajax({data:$.param($(this).serializeArray()) + '&authenticity_token=' + encodeURIComponent('82f4b06c69f0a622c1b645be3c986ca45ae0a281'), dataType:'script', type:'post', url:'/troop/bulk_edit_get_something'}); return false;
    $.ajax(
           {data:$.param($(formNode).serializeArray()) + '&loadDetails=true',
                   dataType:'script',
                   type:'get',
                   url:'/troop/bulk_edit_ranks'
                   }
           );



    return false;
}