How to redirect the user to the page he was located after some task is done

Sep 19 2011 6:48 AM

Hi,

I have a page with a dropdownlist which consists of cityname from a master table.. Beside the dropdownlist i have a button,if the cityname does not exists the user can click the button beside the dropdownlist which will redirect the user to another page to add the city name.. After the user has added the cityname he should come back to the page where he was.. How to do this?