Web Phone Application

[Dan Sampson]

I am currently writing a application (form input mainly) for my web site
and it needs to be compatible with any web phone.  I have web phone
capabilities on my phone but it is a little annoying to test everything
via my phone.  What is the best way to test this?  Is there a good
application that I can download onto my computer or do I just have to
use a text base browser?  If it were an app, I would prefer the ability
to use it on my mac but I have a pc and linux box so I can go either
way.
 
Any advice / tips would be greatly appreciated.
 
Thanks,
 
Dan Sampson