//pagina HTML
codice:
<form action="convalida.asp" name="frm" method="POST">
    <input type="text" name="user">
    <input type="password" name="pwd">
</form>
//pagina convalida.asp
codice:
<%
dim usr,pwd

usr = Request.Form("user")
pwd = Request.Form("pwd")

/* poi fai i tuoi controlli sul database */

%>