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Jens Bruntt EXPERT RESPONSE FROM: Jens Bruntt

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QUESTION POSED ON: 01 August 2005
I have two dropdowns on a form. When I select a value in the first dropdown, the second dropdown should automatically get filled, based on the value of first dropdown. What is the best way to achieve this kind of functionality in JavaScript? I am current using the JS @dblookup function, but this solution is quite inefficient when the number of return values is large. Is there any way to get the data thru XML?


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An XML-based way of doing what you want is the modern way. AJAX (Asynchronous JavaScript Technology and XML) is the current label for the kind of technology you're looking for. Basically this method uses the built-in functionality of the browser to retrieve an XML page and then process it.

Unfortunately, I have no personal experience using AJAX. However, here is a good example.

Also, here are some links for learning more about AJAX:



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