eccolo Vincent.
Contestualizzato e funziona.
Grazie mille!!

Si ho postato solo la parte da modificare.
codice:
<%cellCount=0
    response.write "<table width=""100%"" border=""0"" cellspacing=""0"" cellpadding=""0"">"
    Do While iRecordsShown < iPageSize And Not RecordsetArticoli.EOF
    cellCount=cellCount+1
    if cellCount=4 then cellCount=1
    if cellCount = 1 then response.write "<tr>"
    %>
 <td style="padding-bottom:4em" class="product-left p-left">
<a href="scheda_articolo.asp?idarticolo=<%=RecordsetArticoli("ID")%>" class="mask"><IMG class="img-responsive zoom-img" SRC="immagini/<%=RecordsetArticoli("Riferimentodifoto")%>" border="0" width="230"></a><p class="product-bottom1" align="center"><b><%=RecordsetArticoli("denominazione")%></b><br><br><span class="item_price">€ <%=RecordsetArticoli("prezzo")%></span></p></td>
    <%
    if cellCount = 3 then response.write "</tr>"
    iRecordsShown = iRecordsShown + 1
    RecordsetArticoli.MoveNext
Loop%>
<%if cellCount < 3 then response.write "</tr>"
    response.write "</table>"%>