I'm dropping this little doodad into LJ so I've got it archived somewhere, just in case I ever need to cheat at web design and use a 1px trasnsparent gif again.
<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" />
That's an image tag that calls a data URL for a 1px transparent gif... essentially, it doesn't need to bother going and getting the file - it's only a teeny, tiny little thing, so it may as well be encoded into the markup inline instead of included from elsewhere.
<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" />
That's an image tag that calls a data URL for a 1px transparent gif... essentially, it doesn't need to bother going and getting the file - it's only a teeny, tiny little thing, so it may as well be encoded into the markup inline instead of included from elsewhere.