title: Javascript return number of days,hours,minutes,seconds between two dates
body: <p>Does anyone can link me to some tutorial where I can find out how to return days , hours , minutes, seconds in javascript between 2 unix datetimes?</p>
  
  <p>I have:</p>
  
  <pre><code>var date_now = unixtimestamp;
  var date_future = unixtimestamp;
  </code></pre>
  
  <p>I would like to return (live) how many days,hours,minutes,seconds left from the date_now to the date_future.</p>