How to set the Grid Model property Kendo grid Editable using Jquery

Hi team,

 How to change kendo grid property  using jquery. i want change property of kendo Grid. 

if (Some condition)

{

        var grid = $("#GridGlobalNewRequest").data("kendoGrid");
        grid.dataSource.options.schema.model.fields.StartCompany.editable = true;
        grid.dataSource.options.schema.model.fields.IsRead.editable = true;

}

else

{

         var grid = $("#GridGlobalNewRequest").data("kendoGrid");

        grid.dataSource.options.schema.model.fields.StartCompany.editable = false;

        grid.dataSource.options.schema.model.fields.StartCompany.defaultValue = "9990"; // Default Value

}

Thanks

Senthilkumar N