function relative_time(time_value) {
    var values = time_value.split(" ");
    time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
    var parsed_date = Date.parse(time_value);
    var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
    var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
    delta = delta + (relative_to.getTimezoneOffset() * 60);

    if (delta < 60) {
      return 'less than a minute ago';
    } else if(delta < 120) {
      return 'about a minute ago';
    } else if(delta < (45*60)) {
      return (parseInt(delta / 60)).toString() + ' minutes ago';
    } else if(delta < (90*60)) {
      return 'about an hour ago';
    } else if(delta < (24*60*60)) {
      return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
    } else if(delta < (48*60*60)) {
      return '1 day ago';
    } else {
      return (parseInt(delta / 86400)).toString() + ' days ago';
    }
  }
  
	function twitterCallback(obj) {
	    var twit = $('twitter-main');
	    if (!twit) return;
	    
	    var tweets = '<div class="tweets">';
	    
		for(i=0; i < obj.length; i++) {
		    var t = obj[i];
		    var txt = obj[i].text.replace(/(https?:\/\/(?:www\.)?)([^ !<>"]+)/g,'<a href="$1$2">$2</a>');		    
		    tweets += '<div class="tweet tweet-' + i + '">' + txt + '<p class="tweet-time"><a href="http://twitter.com/' + obj[0].user.screen_name + '">' + relative_time(obj[i].created_at) + "</a></p></div>";
	    }
	    twit.innerHTML = tweets + '</div>';
	    var twitcontent = $(twit.firstChild);
	    twitcontent.hide();
		Effect.Appear(twitcontent,{duration:0.5});
	}