Função de Preload de Imagens no Javascript

PreloadImages.js

function preloadImages(images, callback) {
	var count = images.length;
		if(count === 0) {
			callback();
		}
	var loaded = 0;
	$(images).each(function() {
		$('<img>').attr('src', this).load(function() {
			loaded++;
			if (loaded === count) {
				callback();
			}
		});
	});
};