passing parameters discretely

Hi,
Current situation: I have an unordered html list with list items calling an asp (with an url parameter), look at the code below
Desired situation: I have an unordered html list with list items calling an asp (without url parameter, instead passing parameter in a different way, maybe via the session variable).
Question: how to pass selected list item value/index to an asp (without url parameters)?

Thanks

<% LocalArray = Session("JaarArr") %>
<ul class="secondair-menu" id="YearList">
  <% For i = 0 to cInt(Session("Aantaljaar"))-1 %>
    <li><a href="cumulatief.asp?jaar=<%=localArray(i)%>"><script   
        language=Javascript>formatjaar(<%=localArray(i)%>)</script></a></li>
  <% Next %>
</ul>

Code (markup):

 

The only way I know of passing values outside of a URL string in ASP is by posting the values to the destination page, like so:

### start page ###

<% LocalArray = Session("JaarArr") %>
<form id="formx" method="post" action="cumulatief.asp">
<select id="YearList">
  <% For i = 0 to cInt(Session("Aantaljaar"))-1 %>
    <option value="<%=localArray(i)%>"><%=localArray(i)%>)</option>
  <% Next %>
</select>
<input type="submit" value="submit" />
</form>

Code (markup):

### cumulatief.asp ###

<%
If Request.Form("YearList") <> "" Then
'whatever other processing you want to do here...
Session("SelectedValue") = Request.Form("YearList")
End If
%>

Code (markup):

You could make it a bit smoother by using javascript to submit the form on the starting page (onchange="document.formx.submit();") not perfect but may be worth looking into as a workaround.

Good luck with it!