$("#grid_groupModel").change(function (evt) { grid.option("groupModel",$(this).prop("checked")); grid.refresh(); }).attr("checked", grid.option("groupModel.on"));
<label><input type="checkbox" id="grid_groupModel"> Grup Panel </label> <br>
Uncaught use groupOption() to set groupModel options.
$("#grid_groupModel").change(function (evt) { grid.Group().option({on: $(this).prop("checked")}); grid.refresh();}).attr("checked", grid.option("groupModel.on"));