Wha is the meaning of this js.js?version=1364903356 in a webpage?
<p>Every time i refresh a site and view its page source, the javascript src i.e <code>js.js?version=1364903356</code>; the version number always changes.</p>

<p>My question is: What is the meaning of this number; and if i put <code>js.js</code> in every page, the site is not working. </p>
