title: Why is 9999999999999999 converted to 10000000000000000 in JavaScript?
body: <p>Can any one explain to me why 9999999999999999 is converted to 10000000000000000?</p>
  
  <pre><code>alert(9999999999999999); //10000000000000000
  </code></pre>
  
  <p><a href="http://jsfiddle.net/Y2Vb2/" rel="noreferrer">http://jsfiddle.net/Y2Vb2/</a></p>