<html>
<head>
<title>OpenLayers MousePosition Example</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/openlayers/2.11/lib/OpenLayers.js"></script>
<style type="text/css">
html, body, #mapdiv {
width:100%; height:100%; margin:0;
}
</style>
</head>
<body>
<div id="mapdiv"></div>
<script>
epsg4326 = new OpenLayers.Projection("EPSG:4326")
map = new OpenLayers.Map({
div: "mapdiv",
displayProjection: epsg4326
} );
//Add the MousePosition control to show coordinates
map.addControl(new OpenLayers.Control.MousePosition());
map.addLayer(new OpenLayers.Layer.OSM());
map.zoomToMaxExtent();
</script>
</body></html>