You can view the complete source code at http://www.text2png.com/text_script_full.js
If you saved the script to your server (not using our server), please update the file. You don't need to update your code at all.
To find out how the script works, please visit http://www.text2png.com/performance.php
(save_url.php is the second http request)
The save_url.php saves the js files refrence file (for your page). Since JS is not cross domain, we have to create a JS file for each page that display any images.