init-google-maps

 var map;
 function initialize() {
         var mapOptions = {
                 zoom: 8,
                 center: new google.maps.LatLng(-34.397, 150.644)
         };
         map = new google.maps.Map(document.getElementById('map-canvas'),
                 mapOptions);
 }

 google.maps.event.addDomListener(window, 'load', initialize);