Okay I got some good advice for Mobile Detection but still having an issue with themed tablets as the icons will be larger for a tablet view then a mobile device. I'm using jQueryMobile as the framework and it does detect the iPad (And I'm sure other tablets are on the way), but how can I detect if it's a tablet or mobile device? would I just go with the screen size?
If that's the case than what's the largest screen size for a mobile device or the smallest screen for a tablet?
is there a better way?
jQuery Mobile adds classes to the body tag which allows you to create a single CSS for all the devices.
See here: http://jquerymobile.com/demos/1.0a3/#docs/api/mediahelpers.html
update
As of beta2 helpers will be deprecated and set for removal. You should take a look at media queries
which were used to put these classes in there anyway.