title: Regular Expression to validate a timestamp
body: <p>I need a regular expression to validate a timestamp of the format, <strong>using Javascript</strong>:</p>
  
  <blockquote>
    <p>YYYY/MM/DD HH:MI:SS</p>
  </blockquote>
  
  <p>I tried cooking up a few, but seems my regex skills fail to cover something or other.</p>
  
  <p>Please give me a reference or way to do it.</p>
  
  <p><em>P.S. : I mention regex, only as a suggestion. Im using Javascript and welcome any alternative.</em></p>