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drop down list pair population

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I would like to know if it is possible to have two drop down lists in a JSP such that choosing an option on one populates the other. Both the lists are to be populated from arrays.
Is it possible to do this without using java script? If so please let me know how with an example.
thanks a lot
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As far as your question, keep in mind that the only way to let the server know that something has been selected is to make a round trip and send it some sort of a request. Basically the oly thing a JSP (or a servlet for that matter) do is send a response to the browser after they ae done processing the request. To get new inofrmation/outpu from a JSP or servlet you need to send a new request and get a new response. To do something like this and not make another round trip to the server you would almost have to use javascript. The only other solution I can think of would be an applet but I'm not familiar enough with them to tell you, but there you'd still be making a round trip to the server to get the data to populate the list.
hope that helps
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