Request.Twitter = new Class({
    Extends: Request.JSONP,
    options: {
        linkify: false,
        url: 'http://twitter.com/statuses/user_timeline/{term}.json',
        data: {
            count: 5
        }
    },
  
    initialize: function(term, options){
        this.parent(options);
        this.options.url = this.options.url.substitute({term: term});
    },
  
    success: function(data, script){   
        if (this.options.linkify) data[0].each(function(tweet){
            tweet.text = this.linkify(tweet.text);
        }, this);
    
        // keep subsequent calls newer
        if (data[0]) this.options.data.since_id = data[0].id;
    
        this.parent(data, script);  
    },
  
    linkify: function(text){
    // modified from TwitterGitter by David Walsh (davidwalsh.name)
    // courtesy of Jeremy Parrish (rrish.org)
        return text.replace(/(https?:\/\/[\w\-:;?&=+.%#\/]+)/gi, '<a href="$1">$1</a>')
            .replace(/(^|\W)@(\w+)/g, '$1<a href="http://twitter.com/$2">@$2</a>')
            .replace(/(^|\W)#(\w+)/g, '$1#<a href="http://search.twitter.com/search?q=%23$2">$2</a>');
    }
});