<html>
<head>
<script src="http://maps.googleapis.com/maps/api/js">
</script>
<script>
var map;
var myCenter=new google.maps.LatLng(45.434046,12.340284);
function initialize()
{
var mapProp = {
center:myCenter,
zoom:18,
mapTypeId:google.maps.MapTypeId.HYBRID
};
map=new google.maps.Map(document.getElementById("googleMap"),mapProp);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<button onclick="alert(map.getHeading());">Drag the compass wheel and get heading/degrees</button>
<br><br>
<div id="googleMap" style="width:500px;height:380px;"></div>
</body>
</html>