window.onload = function(){ 
var refreshed_content = Array('!content','menu','header'); 
bda.loadText = '<span id="loading">Loading...</span>';
	bda.calculateText = '<span id="loading">Preloading images, parsing content ...</span>';
	bda.errorText = '<h1>The page could not be loaded</h1><p>If you keep getting this the server can be down or somethings wrong with your connection.';
	bda.imagesNotLoadedText = '<span id="loading">Some images could not be loaded.<br/>The page will display without these images.</span>',
// you need to mark your primary area with a "!". 
// you can add as many secondary area's as you like, for example 
// var refreshed_content = Array('!content','sidebar', 'navigation', 'another_area'); 
bda.start(refreshed_content); // initiate the script 
}