$(document).ready(function() {
	
function preload(arrayOfImages) {
	$(arrayOfImages).each(function(){
		$('<img/>')[0].src = this;
		// Alternatively you could use:
		// (new Image()).src = this;
	});
}
// Usage:
	preload([
		base_url+'assets/img/bg_seattle.jpg',
		base_url+'assets/img/bg_waste.jpg'
	]);
});