Is it possible to select multiple rows in a WebDataGrid without having to hold CTRL, SHIFT, or dragging?  Basically, I would like the selected rows to remain "sticky", kind of like a checkbox functionality, except with the row selection element (ie. click an unselect row to select, click a selected row to unselect - but without affecting the rest of the selected rows in the process).

I've tried tricking the event object in the browser into thinking the CTRL key is pressed (via JS), but I don't think it's possible.