The simplest ASP implementation refresh randomly display two different ads picture code

In doing an ad delivery system, you need to randomly display two different advertising pictures, the following time by the number of seconds to control the random appearance of the function.
This example only supports two different pictures of the random display effect, if you need more random pictures, you can simply modify it.

The following is the ASP code: <% If Second (now ()) Mod 2 = 0 Then %> <% Else %> <% End If %>