loading JSON data to grid

Hi,
    in my grid i want to load the json data which is coming from servlet.
mygrid.load("/admin/manage/country?action=loadData",“json”);
onchange of active/inactive/all i want to send value of changed option ie active or inactive or all .
please tell me how to append and send the option value and url. so onchange of option value i want to laod json data in my grid.


Regards,
Ravindra B


All



function reload_grid(mode){
mygrid.clearAll();
mygrid.load("/admin/manage/country?action=loadData"&mode="+mode,“json”);
}