title: Populate one dropdown based on selection in another
body: <p>I need to change the contents of dropdown B based on the selection in dropdown A using javascript.  There are no db queries involved--I know beforehand what the contents of B should be given the choice in A.  I have found some examples using AJAX, but since there is no db query involved that's not necessary.  Can anyone point me to some example code for how to do this?</p>