csPreloadImage('_images/cat.png');
csPreloadImage('_images/cat-gray.png');
csPreloadImage('_images/dog.png');
csPreloadImage('_images/dog-gray.png');
csPreloadImage('_images/parrot.png');
csPreloadImage('_images/parrot-gray.png');
csPreloadImage('_images/mouse.png');
csPreloadImage('_images/mouse-gray.png');