+
+Lightbox.prototype.enableDDOrdering = function() {
+       addListener(this.grid, 'dragstart', this._DDOrderingListeners.dragstart);
+       addListener(this.grid, 'dragover', this._DDOrderingListeners.dragover);
+       addListener(this.grid, 'dragend', this._DDOrderingListeners.dragend);
+};
+
+Lightbox.prototype.disableDDOrdering = function() {
+       removeListener(this.grid, 'dragstart', this._DDOrderingListeners.dragstart);
+       removeListener(this.grid, 'dragover', this._DDOrderingListeners.dragover);
+       removeListener(this.grid, 'dragend', this._DDOrderingListeners.dragend);
+};
+