JavaScript -> Auto-updating Image

[PatientZero]

That script is actually pretty simple when you break it down.

All the code is doing is redirecting to an image located in the "http://thedilbertstore.com/images/periodic_content/dilbert/" directory and adding the filename based on the current date.
So long as the file names still follow the same pattern I think you should be able to remove the <img> tag from it and reference the javascript file as if it were an image, currently it's outputting html.
So uh, the last line would be;

Code:

document.write('http://thedilbertstore.com/images/periodic_content/dilbert/dt' + year + '' + month + '' + day + dayofweek + 'hct.jpg');

and you'd reference it as

Code:

[img]http://whatever.butt/yourcode.js[/img]

Personally I'd want to test that myself to be sure, I haven't worked much in Javascript so I might get getting wires crossed.
Assuming you've got it in a public folder I think it should work in dropbox, since I'm pretty sure javascript is run client-side and it's just spitting out a url.

Of course if anyone is more well versed in Javascript I'd listen to them if they say I'm talking garbage here.