title: Get friday from week number and year in javascript
body: <p>I have week number and year, need to find out date (friday) in that week and year.</p>
  
  <pre><code>function getFriday(week_num, year)
  {
      ?
  
      return friday_date_object;
  }
  </code></pre>
  
  <p>How do I do that?</p>