If you look to the official Olympics 2008 page, there is no sport called "Track & Field". There is a sport called "Athletics" and that is the link you need to follow to find the schedule and results.
One of the better laid out pages, I have seen is the IAAF page here
With one simple layout, the provide by day, the events, results, and all important, the time here (or wherever you are) vs. China.
As you click to the results, they open below you so you don't have to get lost in navigation.