Any Kannada font support all the different OS

Hi,

I'm Manish Deo.
I'm working on integrating my website design into Kannada language. and things are starting to come along, but i cant get the font name which can support all the different OS [Windows, Linux, Mac].

What is the code to support all the different OS. Suppose, The web site which i have developed is written using javascript, php and i given default font. In case if Other OS client will try to access my web page so how the kannada font will support to that machine?

Please help me to get the rescue from this. And Advance thanks to all.

Ornamental seperator