1. <!--[if !IE]>-->
  2. <link type="text/css" rel="stylesheet" media="only screen and (max-device-width: 480px)" href="http://example.com/iPhone.css" />
  3. <link type="text/css" rel="stylesheet" media="only screen and (min-device-width: 768px) and (max-device-width: 1024px)" href="http://example.com/iPad.css" />
  4. <!--<![endif]-->