title: Can someone explain the significance of this code snippet [Javascript]
body: <pre><code>function play()
  {
  if (typeof Game_Interval != "undefined")
  clearInterval(Game_Interval);
  Game_Interval = setInterval(paint, 60);
  allowPressKeys = true;
  }
  </code></pre>
  
  <p>What exactly is Game_Interval and why isnt it declared as a variable in the code?
  The above mentioned function is a part of a snake game program using javascript and HTML canvas tag.</p>