Get Off Those Maliciously Loaded Scripts!
Download this free Anti-Malware Plugin for WordPress.

Thanks for sending me you footer.php file. Unfortunately this malicious JavaScript was not generated from within that file.

After seeing that file it is clear that this malicious code is being generated by another file using the wp_footer hook. This could be a rogue plugin file or a hacked WP Core file or maybe even some new filter/action added to the functions.php file.

Can you send me a list of your plugin (a screenshot of the Installed Plugins page in your wp-admin will do), and a list of all the folders in your /wp-content/plugins/ directory too?