Required library edition:
Required library file: dhtmlxgrid_markers.js

sets selection or removes selection from specified cell

• r - row object or row index
• cInd - cell index
• state - true or false

   //mark cell
   mygrid.mark('row1',0,true);
   //unmark cell
   mygrid.mark('row1',0,false);

Please make sure that necesary cell is loaded before calling this method.

See also: enableMarkedCells, getMarked, unmarkAll