This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Well, you didn't say, but I assume you're looking for a way to avoid the page refresh?
If so, Ajax is the answer for you. With Ajax you can make a request back to the server when the value of a dropdown changes in order to fetch the data (and just the data) needed to populate the dependent dropdown.
Joined: Jan 12, 2007