ho provato così ma non funziona .. estae solo le voci con "-1"
codice:
<%
sql = "SELECT * FROM TabC where categoria='-1'"
Set rs= Server.CreateObject("ADODB.Recordset")
rs.Open sql, conn, 3, 3
%>
<select class="fixed" multiple size="10" name="pippo">
<%rs.MoveFirst
while not rs.eof%>
<option value="<%=rs("id")%>"><%=rs("voce")%></option>
<%
catz = rs("id")
sql = "SELECT * FROM TabC where categoria='"& catz &"'"
Set rs2= Server.CreateObject("ADODB.Recordset")
rs2.Open sql, conn, 3, 3
rs2.MoveFirst
%>
<option value="<%=rs2("id")%>"><%=rs2("voce")%></option>
<%
rs2.MoveNext
rs2.close
%>
<%
rs.MoveNext
wend
rs.close
%>