Geolocation

I’m looking for an HTML5 geolocation script that takes a fixed point (provided by a php page) and then maps out a walking path via Google maps to the user’s current location (a GPS capable device – iPhone or Android).

I’ve got the PHP part done and have a sample geolocation script I found online, but it shows text directions as well that take up half the page. I want the map to be full screen. Also I’d like the script to use the watchPos method to update the user’s location as they get closer to the destination.