// init function will be executed when dom is ready
function init() {
  if (GBrowserIsCompatible()) {
    // Create a new google map
    var map = new GMap2(document.getElementById('map_sample1'));
     
    // Center on the world
    map.setCenter(new GLatLng(47, 1), 4);
     
    // Add controls
    map.addControl(new GSmallMapControl());
    
     // Attach maptimize service
    window.maptimizeMap = new Maptimize.Map(map);
  }
}

// Code based on Prototype. Of course you can use any JavaScript framework
// like jQuery for example : $(document).ready(init);
//
// Or use window onload event : window.onload = init;
document.observe('dom:loaded', init);