hi.. this is my first post
need help

i'm using asp classic and i don't know how to get unselected item from listbox


1st page: mail-form.asp
================================================
<form name="form1" method="post" action="send-mail.asp">

<select id="theSelect" name="theSelect" MULTIPLE >

<option value="1">First Option</option>
<option value="2">Second Option</option>
<option value="3">Third Option</option>

</select>

</form>
================================================

2nd page: send-mail.asp
================================================
<%
'get selected item
dim itemSelected, itemUnSelected
itemSelected = Request.Form("selectedOptions")
%>
================================================


my question is: how to get Unselected Item in send-mail.asp from mail-form.asp?


thx