gistfile1.js

            beforemovenode: function (tree, node, oldParent, newParent, index) {
              var self = this;
              self.moved = false;
              self.ready = false;

              Ext.Msg.confirm('', '', function (button) {
                if (button === 'yes') {
                  $.ajax({
                    async: false,
                    url: CMS.BaseUrl() + 'pfCMSTree/moveNode/',
                    data: {
                      tree: tree.getRootNode().id,
                      node: node.id,
                      newparent: newParent.id,
                      index: index
                    },
                    dataType: 'json',
                    type: 'POST',
                    error: function () {
                      self.moved = false;
                      self.ready = true;
                    },
                    success: function(data) {
                      self.moved = data.moved;
                      self.ready = true;
                    }
                  });
                }
                else {
                  self.ready = true;
                }
                return self.moved;
              }, self);
            },