I am not sure what you need with this loop, but if you want to create SELECT form element based on the value in querystring, here is the sample code:
Code:
StartDay = Request.QueryString("Start")
Response.Write "<select name=somename>"
For Counter = 1 To 31
If Counter = StartDay Then
Response.Write "<option value=" & Counter & " selected>" & Counter & "</option>"
Else
Response.Write "<option value=" & Counter & ">" & Counter & "</option>"
End If
Next
Response.Write "</select>"
...but the Soon is eclipsed by the Moon