Added rel="short_url" case

shorten-bookmarklet.js

/* Expanded form of a bookmarklet for extracting rev=canonical OR tinyurling a page */
(function(){
	var url=document.location;
	var links=document.getElementsByTagName('link');
	var found=0;
	for(var i = 0, l; l = links[i]; i++) {
		if (l.getAttribute('rev') == 'canonical' || (!(/icon/).exec(l.getAttribute('rel')) && (/short/).exec(l.getAttribute('rel')))) {
			found=l.getAttribute('href');
			break;
		}
	}
	if (found) {
		prompt('URL:', found);
	} else {
		window.onTinyUrlGot = function(r) {
			if (r.errorCode == 0) {
				var t;
				for(var i in r.results) {
					t = r.results[i].shortUrl;
				}
				prompt('URL:', t);
			} else {
				alert('Could not shorten with bit.ly');
			}
		};
		var s = document.createElement('script');
		s.type='text/javascript';
		s.src='http://api.bit.ly/shorten?login=bitlyapidemo&apiKey=R_0da49e0a9118ff35f52f629d2d71bf07&version=2.0.1&callback=onTinyUrlGot&longUrl=' + encodeURIComponent(document.location);
		document.getElementsByTagName('head')[0].appendChild(s);
	}
})();