Required library edition:
Required library file: dhtmlxgrid.js

set value for all checkboxes in specified column

• col_ind - column index
• v - value, 0 - not checked, any other value - checked

   //check all checkboxes in the first column
   mygrid.setCheckedRows(0,1);
   //uncheck all checkboxes in the first column
   mygrid.setCheckedRows(0,0);

See also: checkAll, getCheckedRows