selectionMethod : (basic|checkbox) Default: "basic"
 The type of the row selection mechanism.
If this setting is set to "basic" when the user select a row, then this row will be highlighted.
If this setting is set to "checkbox" a column with checkboxes will appear as first row of the grid and when the user select a row, then this row will be highlighted and the checkbox selected.
Examples
  
  <table id="grid"></table>
 <script>
     $("#grid").grid({
         dataSource: "../Grid/GetPlayers",
         selectionType: "single",
         selectionMethod: "checkbox",
         columns: [ { field: "ID" }, { field: "Name" }, { field: "PlaceOfBirth" } ]
     });
 </script>