parse tweets

gistfile1.js

// based on http://www.simonwhatley.co.uk/parsing-twitter-usernames-hashtags-and-urls-with-javascript

String.prototype.parseTweet = function(){
  return this
    .replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&~\?\/.=]+/g, function(url) {
      return url.link(url);
    })
    .replace(/[@]+[A-Za-z0-9-_]+/g, function(u) {
      var username = u.replace("@","")
      return u.link("http://twitter.com/"+username);
    })
    .replace(/[#]+[A-Za-z0-9-_]+/g, function(t) {
      var tag = t.replace("#","%23")
      return t.link("http://search.twitter.com/search?q="+tag);
    });
}

// just give your bottom-most divs (those with only text, no child elements)
// a class of 'tweet' and you'll be all set
window.onload = function(){
  var i, tweet_divs, div;
  tweet_divs = document.getElementsByClassName('tweet');
  for (i=0; i<tweet_divs.length; i++) {
    div = tweet_divs[i];
    div.innerHTML = div.innerHTML.toString().parseTweet();
  }
}