title: Finding min and max time in a set of arrays
body: <p>I have a array of time as,</p>
  
  <pre><code> var arr= ["17:30:48","19:30:48","18:30:48","19:30:48","17:40:48","19:10:48","17:10:48","19:30:45","17:13:48","19:13:48","17:30:48","19:28:48"];
  </code></pre>
  
  <p>I want to get the  min and max time out of these. tried if else but its becoming to lengthy by it.is there any easy way to do it.</p>