[Zope] handling SELECT 'onchange'

I have source code that someone original wrote in javascript and which I'm attempting to get running in Zope by replacing the javascript code with DTML and an external python method but my code does not work. The HTML/DTML code looks like this: <SELECT name="myselect" onchange=<dtml-var expr="select_handler(value)"> > <OPTION value="choice1">choice1</OPTION> <OPTION value="choice2">choice2</OPTION> <OPTION value="choice3">choice3</OPTION> </SELECT> Question 1: Should this work? Question 2: Does it make sence to change the client side javascript code with server side DTML? It seems like it may be better to let the javascript code deal with the selection for efficiency. Jim