Edit in JSFiddle

 PANOSKIN.createViewer({
     id: 'virtualTour',
     tour: 'TOUR-ID',
     panoStart: {
       panoid: 'panoid',
       pov: {
         heading: 0,
         pitch: 0,
         zoom: 1
       }
     }
 })
<body>
  <div id="virtualTour"></div>
  <script src="//lcp360.cachefly.net/panoskin.min.js"></script>
</body>
#virtualTour {
    width: 100%;
    height: 100%;
    max-width: 900px;
    max-height: 562px;
    margin: 0 auto;
}