Data Entry Form with dynamic dropdown boxes

[adwfun]

Hi, I am working on a Form for user to register & enter their info such as name, email, address, tel etc. and I put in a couple of dropdown boxes namely country and city where user can select. I made them dynamic, i.e. the city dropdown is based on the selected value from country and the data retrieved from MySQL database.
The problem I have is the Javascript script involved a reload of the form and once I select a value from Country, the city dropdown populated with data OK but the data entered beforehand (Name, email, etc.) disappeared.
How can I rectify it ?
Please, anyone ?

[bogu]

First u can use ajax so u don't have the need to reload the page, or when u select your country u either send through GET all the data entered before or u submit the form and u should have all the data entered by that user, coming on POST ...