title: Why using href="// instead of href="http:// in HTML?
body: <p>Why using <code>&lt;link href="//something.com/style.css" rel="stylesheet"&gt;</code> instead of using <code>http://</code> or <code>https://</code> before the domain name? </p>
  
  <p>If we use <code>href=//</code> does it changes with link? Like while in SSL mode will it automatically be changed to <code>https://</code>?</p>