Variables and Forms

[kerravon.geo]

I have a select drop-down and I would like to send the value to a
function on submitting the form. The problem is the variable is empty.
Below is the code I am using...any ideas? Thanks for your help!

<%
Response.write("<STRONG>Available Map Bookmarks</STRONG>")
Response.write("<SELECT name='selBookmark'>")
Response.write("<option value='' selected></option>")
Response.write("<option value='59885'>Council</option>")
Response.write("</SELECT>")
Response.write("</FONT>")
Response.write("<INPUT TYPE=Button NAME=buGoto VALUE=Go
onclick=javascript:zoomTo('Parcels','PAR0904_ID'," + "'" +
request.form("selBookmark") + "');>")
'Response.write("<INPUT TYPE=Button NAME=buGoto VALUE=Go
onclick=zoomTo('Parcels','PAR0904_ID','59885');>")
Response.write("</TD></TR>")
%>