parse the twitter date(created_at) into a nice format.

parseTwitterDate.js

function parseTwitterDate(tdate) {
  var systemDate = new Date(Date.parse(tdate));
  var userDate = new Date();
  var diff = Math.floor((userDate - systemDate) / 1000);
  if (diff <= 1) {return 'just now';}
  if (diff < 20) {return diff + ' seconds ago';}
  if (diff < 40) {return 'half a minute ago';}
  if (diff < 60) {return 'less than a minute ago';}
  if (diff <= 90) {return 'one minute ago';}
  if (diff <= 3540) {return Math.round(diff / 60) + ' minutes ago';}
  if (diff <= 5400) {return '1 hour ago';}
  if (diff <= 86400) {return Math.round(diff / 3600) + ' hours ago';}
  if (diff <= 129600) {return '1 day ago';}
  if (diff < 604800) {return Math.round(diff / 86400) + ' days ago';}
  if (diff <= 777600) {return '1 week ago';}
  return 'on ' + systemDate;
}

thanks