[eluser]nirbhab[/eluser]
After a page refresh, you cannot restore what ajax or a javascript function has done on the client side page.
If you some how prevent the page refresh, than your script can do , what ever you wanna perform on the client side.
if your other two drop downs are generated by ajax, ask your script to set the value of the drop down to what is sent by the server.
document.getElementById('drop_down_id').value = 'some_data';