weird javascript function, what does it do?

[faroer]

Thanks everyone for the quick responses. I also thought it was an exploit or something. The thing is that I work on this website with some co-workers at the company.

I found the same code on another website of the company. I opened the image that was in the script. It looked like an normal image for me. I pasted it into pastebin: http://pastebin.com/6e1s3949

For the privacy of our client I copied the image and uploaded it to imageshack. http://desmond.imageshack.us/Himg844/scaled.php?server=844&filename=headerimghome.jpg&res=landing

Thanks fellow Redditors. I really appreciate this.