help with obfuscated javascript

[Andrew <andrewjsm () gmail com>]

I'm already familiar with how to unobfuscate  basic unescaped javascript 
such as %79%6C%75%6D, etc.

I recently ran across a file with the following:

unescape("%u9090%u9090%u0feb%u335b%u66c9%u80b9%u8001%uef33%ue243% .....

Any idea what this encoding is/how to decode it?

Thanks!

---------------------------------------------------------------------------
This list is sponsored by: ByteCrusher

Detect Malicious Web Content and Exploits in Real-Time.
Anti-Virus engines can't detect unknown or new threats.
LinkScanner can. Web surfing just became a whole lot safer.

http://www.explabs.com/staging/promotions/xern_lspro.asp?loc=sfmaildetect
---------------------------------------------------------------------------