In the login section of inc_header would this work?
if Request.ServerVariables("HTTP_REFERER") = "mysplash.asp" then
Response.Write "<meta http-equiv=""Refresh"" content=""2; URL=""default.asp"") & """>" & vbNewLine & _
"<p align=""center""><font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """><a href=""default.asp"">Back To Forum</font></a></p>" & vbNewLine & _
"<table align=""center"" border=""0"" cellPadding=""0"" cellSpacing=""0"" width=""95%"">" & vbNewLine & _
" <tr>" & vbNewLine & _
" <td>" & vbNewLine
else
Response.Write "<meta http-equiv=""Refresh"" content=""2; URL=" & Request.ServerVariables("HTTP_REFERER") & """>" & vbNewLine & _
"<p align=""center""><font face=""" & strDefaultFontFace & """ size=""" & strDefaultFontSize & """><a href=""" & Request.ServerVariables("HTTP_REFERER") & """>Back To Forum</font></a></p>" & vbNewLine & _
"<table align=""center"" border=""0"" cellPadding=""0"" cellSpacing=""0"" width=""95%"">" & vbNewLine & _
" <tr>" & vbNewLine & _
" <td>" & vbNewLine
end if