Hittin' the edge cases

I've seen several PDF/DOC/PPT preview bookmarklets (which work by rewriting the links to go through docs.google.com), but all of them didn't quite work for me (mostly, because they didn't escape the links correctly).

So here is my version of bookmarklet, drag this link: “PDF preview” into your Bookmarks toolbar. Clicking on it will cause all the links to PDF/DOC/PPT documents on the current page to be changed to links which go to a preview in Google Docs.

One nifty feature of this bookmarklet is CiteSeerX support: finally you can preview a PDF of the paper in browser, instead of downloading it (CiteSeerX has an annoying feature of forcing you to download the PDFs)! Why, oh, why didn't I come up with this easy solution before?