OpenLayers zoom level display

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <title>OpenLayers Basic OSM Example with zoom level display</title>
    <link rel="stylesheet" href="https://www.openlayers.org/dev/theme/default/style.css" type="text/css">
    <link rel="stylesheet" href="https://www.openlayers.org/dev/examples/style.css" type="text/css">
    <style>
    .smallmap {
      border: 1px solid #CCCCCC;
      height: 720px;
      width: 1024px;
    }
    </style>
    <script src="https://www.openlayers.org/dev/openlayers.js"></script>
    <script type="text/javascript">
        var map, layer;
		function setDomElement(dom_element) {
		var text = map.getZoom() + " and  the scale is " + map.getScale();
		  if (dom_element.textContent) {
            dom_element.textContent = text;
          } else {
            dom_element.innerText = text;
          }
		}
        function init() {
          map = new OpenLayers.Map('map');
          layer = new OpenLayers.Layer.OSM("Simple OSM Map");
          map.addLayer(layer);
		  var zoomInit = 6;
          map.setCenter(
            new OpenLayers.LonLat(-0.18, 46.69).transform(
              new OpenLayers.Projection("EPSG:4326"),
              map.getProjectionObject()), zoomInit);
		  selectIdInit = document.getElementById("currentZoom");
          setDomElement(selectIdInit);
          //Where you add an event to retrieve zoom level after zoom
          map.events.register("zoomend", map, function () {
            selectId = document.getElementById("currentZoom");
            setDomElement(selectId);
          });
        };
    </script>
  </head>
  <body onload="init()">
    <h1 id="title">Basic OSM Example</h1>

<div id="tags">
        openstreetmap basic light
    </div>

<div id="shortdesc">Show a Simple OSM Map</div>

<div id="docs">
        <p>This example shows a very simple OSM layout with minimal controls.</p>
	<p>It also displays current zoom level <span id="currentZoom">12</span></p>

</div>
  </body>
</html>

Modified http://www.openlayers.org/dev/OpenLayers.js to a secure url

https://www.openlayers.org/dev/OpenLayers.js