Required library edition:
Required library file: dhtmlxgrid_drag.js

switches to the mode when the dragged items drop in the target location in the same order as they were in the source grid.

• mode - true/false to enable/disable mode

   //enable drag order
   mygrid.enableDragOrder(true);
   //disable drag order
   mygrid.enableDragOrder(false);

See also: enableDragAndDrop, enableMercyDrag