[ragtek]

try this:

<script runat="server">
   Function HashMD5(strText As String) As String

      If strText = Nothing Then strText = ""

      HashMD5 = System.Web.Security.FormsAuthentication. _
         HashPasswordForStoringInConfigFile(strText, "md5")

   End Function

strText = Request.QueryString("text")
   strHash = HashMD5(strText)

</script>