Forum OpenACS Development: Regarding the form templates

hi

i want to in the form templates how to write the code for the
following html syntax
<select  onChange=First()>
<option> A</option>
<option> B</option>
<option> C</option>
<option> D</option>
</select>

when i select the box and change the value we will get the onChange event occurs so i want to write the same thing in OpenACS using form templates in the TCL code.
please any body can help me out
thanks
vamshi