A very simple solution would be to just post the data to the first script, and use
- <!--#include file="otherscript.asp" -->
Otherwise it for some reason you totally need to do it as described, well it's going to require javascript.
You could either use 2 form tags w/ different actions on them and submit each using document.form1.submit() - document.form2.submit()
Or more tricky, one form tag which you modify the action attribute using getElementAttribute......
This is assuming you want both post operations to occur from a single button click.
I like the first option best, because it's less hoops to jump through for such a simple requirement.