Required library edition:
Required library file: dhtmlxgrid_selection.js

enables block selection mode in grid

• mode - {true|false} - enable/disable block selection (optional, true by default)

   //enable block selection
   mygrid.enableBlockSelection(true);
   //disable block selection
   mygrid.enableBlockSelection(false);

See also: forceLabelSelection, selectAll, selectCell, selectRow, selectRowById, copyBlockToClipboard