var _toQueryString = function(o) {

    if(typeof o !== 'object') {

        return false;

    }

    var _p, _qs = [];

    for(_p in o) {

        _qs.push(encodeURIComponent(_p) + '=' + encodeURIComponent(o[_p]));

    }

    return _qs.join('&');

};

/**

 * Load HTML into DOM using Ajax

 *

 * @param $target: load html async and place it (or an error message) here

 * @param success: success callback function

 * @param args: query parameters to pass to url

 */

function asynchtml(url, $target, success, args){

    if(args===undefined){

        args=null;

    }

    $target.html(_TM['Loading ...']).css('opacity','0.3');

        .done(function(html) {

                $target.html(html);

                $target.css('opacity','1.0');

                //execute the given original callback

                if (success !== undefined && success) {

                    success();

                }

            })

        .fail(function(jqXHR, textStatus, errorThrown) {

                console.log('Ajax failure: ' + textStatus);

                $target.html('<span class="error_red">ERROR: {0}</span>'.format(textStatus));

                $target.css('opacity','1.0');

            })

        ;

};

var ajaxGET = function(url,success) {

    // Set special header for ajax == HTTP_X_PARTIAL_XHR

    YUC.initHeader('X-PARTIAL-XHR',true);

    var sUrl = url;

    var callback = {

        success: success,

        failure: function (o) {

            if (o.status != 0) {

                alert("Ajax GET error: " + o.statusText);

            };

        }

    };

    var request = YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);

    return request;

};

        <div style="clear:both;padding: 0 0 30px 0;"></div>

        <h4>${_('Changesets')}</h4>

        <div style="float:left;padding:0px 30px 30px 30px">

           ## overview pulled by ajax

           <div style="float:left" id="pull_request_overview"></div>

        </div>

        <div style="clear:both;"></div>

    </div>

    ${h.end_form()}

</div>

<script type="text/javascript" src="${h.url('/js/graph.js')}"></script>

<script type="text/javascript">

  var _USERS_AC_DATA = ${c.users_array|n};

  var _GROUPS_AC_DATA = ${c.user_groups_array|n};

  PullRequestAutoComplete('user', 'reviewers_container', _USERS_AC_DATA, _GROUPS_AC_DATA);

  pyroutes.register('pullrequest_repo_info', "${url('pullrequest_repo_info',repo_name='%(repo_name)s')}", ['repo_name']);

  var otherrepoChanged = function(){

      var repo_name = $('#other_repo').val();

          function(o){

              var data = JSON.parse(o.responseText);

              $('#other_repo_desc').html(data.description);

              // replace options of other_ref with the ones for the current other_repo

              var $other_ref = $('#other_ref');

              $other_ref.empty();

              for(var i = 0; i < data.refs.length; i++)

              {

                var $optgroup = $('<optgroup/>').attr('label', data.refs[i][1]);

                var options = data.refs[i][0];

                var length = options.length;

                for(var j = 0; j < length; j++)

                {

                  $optgroup.append($('<option/>').text(options[j][1]).val(options[j][0]));

                }

                $other_ref.append($optgroup);

              }

              $other_ref.val(data.selected_ref);

              // reset && add the reviewer based on selected repo

              YUD.get('review_members').innerHTML = '';

              addReviewMember(data.user.user_id, data.user.firstname,

                              data.user.lastname, data.user.username,

                              data.user.gravatar_link);

                         as_form=True,

                         merge=True,

                         )}";

      var org_repo = YUQ('#pull_request_form #org_repo')[0].value;

      var org_ref = YUQ('#pull_request_form #org_ref')[0].value.split(':');

      ## TODO: make nice link like link_to_ref() do

      YUD.get('org_rev_span').innerHTML = org_ref[2].substr(0,12);

      var other_repo = YUQ('#pull_request_form #other_repo')[0].value;

      var other_ref = YUQ('#pull_request_form #other_ref')[0].value.split(':');

      YUD.get('other_rev_span').innerHTML = other_ref[2].substr(0,12);

      var select_refs = YUQ('#pull_request_form select.refs')

      var rev_data = {

          '__org_repo__': org_repo,

          '__org_ref_name__': org_ref[2],

          '__other_repo__': other_repo,

          '__other_ref_name__': other_ref[2]

      }; // gather the org/other ref and repo here

      for (k in rev_data){

          url = url.replace(k,rev_data[k]);

      }

          var jsdata = eval('('+YUD.get('jsdata').innerHTML+')'); // TODO: just get json

          var r = new BranchRenderer('graph_canvas', 'graph_content_pr');

          r.render(jsdata,100);

      });

  }

  $(document).ready(function(){

      $("#org_repo").select2({

          dropdownAutoWidth: true

      });

      ## (org_repo can't change)

      $("#org_ref").select2({

          dropdownAutoWidth: true

      });

      $("#org_ref").on("change", function(e){

          loadPreview();

      });

      $("#other_repo").select2({

          dropdownAutoWidth: true

      });

      $("#other_repo").on("change", function(e){

          otherrepoChanged();