[XeTeX] using different fonts for one language (Syriac)

[Adam McCollum]

Dear list members,

I'm working on a document with Syriac text and I need to use two  
different fonts. As some of you probably know, there are three  
different scripts used for Syriac; I am mostly using Serto, but I also  
need to put a few things in Estrangela. I suppose there is a way to do  
this, but I don't know what it is.

Thanks in advance for any help!

Adam McCollum