Okay, so this forum is named "ASP, VB Script". My question is, how do an asp file and a vbs file usually interact?

I am working on email triggers. I am maintaining an ASP application and migrating it to .NET. The trigger functionality doesn't work too well in ASP which makes my job a little bit difficult, not to mention there is no documentation and I get emails like this from the original programmer:
in any event the triggers fro resales which i can't recall what it is is pretty much the trigger code to run each night. you can probably get it into a compiled from easily and make it work with even the existing trigger setup with some mode i'm sure.



But he did point me to the directory structure containing two files, Send_Nightly_Triggers.asp and Send_Nightly_Triggers.vbs. So my question is, how do these two files interact? For example, I searched for Select_NYMEX_Averages and I found this in both files:
(asp)
Line 40 : Call Select_NYMEX_Averages()
Line 88 : Sub Select_NYMEX_Averages()
(vbs)
Line 75 : Call Select_NYMEX_Averages()
Line 123 : Sub Select_NYMEX_Averages()

How do I start walking through this code - with the vbs or the asp? Which one runs first? What else do I need to know about this architecture?

Thanks - I know I'll get more help on this forum than I would talking to anyone that works for my company!