add links to urls, users and hashtags for text from Twitter

twitterify.js

function twitterify(text) {
	return text
		
		// URLS
		.replace(/(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig,
						"<a href='$1'>$1</a>")
		
		// Hashtags
		.replace(/\B#([^ ]+)\b/ig,
				"<a href='http://twitter.com/#!/search?q=%23$1'>#$1</a>")
		
		// Users
		.replace(/\B@([^ ]+)\b/ig,"<a href='http://twitter.com/#!/$1'>@$1</a>");
}