[Zope] Syntax for zpt form and submitting to a dtml method

[Laura McCord]

For learning purposes if I have a zope page tamplate form with a
<select> using a dtml method as a action:

<form action="dtml_method">
 <select name="subject">  
               <option>Select</option>
               <option tal:repeat="result here/view_subject" 
                     value="" tal:attributes="value result/subject"
                     tal:content="result/subject">data</option>
               </SELECT>
 <input type="submit" name="submit" value="submit">
</form>

How would I access the value of subject in the dtml_method:

 <dtml-var subject>

The above did not work. Any Ideas?