[Zope] Getting the value from a select box

Hey all, I can use this code to get the value of a textbox. <dtml-with REQUEST only> <dtml-var "form['txtID']"> </dtml-with> - txtID is the name of the textbox. Now, my question is, how do you get the value from a select drop-down box? <dtml-var "form['size']"> doesn't work where the drop-down box name is size. Also <dtml-var "form['size.value']"> or <dtml-var "form['size.selectedIndex']"> doesn't work, however, I suspect it is because it's thinking I'm asking for a form field named size.selectedIndex or size.value So how do you get this value? Thanks in advance - and I'll probably thank you again after you answer, Tommy