Is there a JavaScript user tracking framework / best practice site?

I am upgrading the tracking of our company click monitoring tool. Currently it uses a <img/> tag to call a page and pass the required information to our system. We need to upgrade this to use <script/> tags and call a JavaScript file hosted on our server, Like Google Analytics Urchin Module

Is there a JavaScript framework / best practice written for this kind of tracking? If not I can write my own but wanted to check that there is not some tried and tested code / pr开发者_Go百科actice for doing this kind of tracking.

Thanks in advance.

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Try this open web analytics tool

http://piwik.org/docs/javascript-tracking/