WordPress AWStats Extended Info automatically includes the AWStats misc. tracker on each page. Requires AWStats (http://awstats.sourceforge.net)
AWStats Xtended Info inserts the awstats_misc_tracker.js into each page WordPress serves, allowing you to track additional items including screen size, Flash, PDF, and Java support among other things.
For finer control you can select which types of pages will include the script from the AWStats X Options page.