var POLAROID = {
	swapImage: function(image_id) {
		this.setBlank(true).chain(
			function() {
				$('polaroid_image').setStyle('background-image', 'url(images/polaroid_' + image_id + '.png)');
				POLAROID.setBlank(false);
			}
		);
	},
	setBlank: function(blank) {
		var blankOpacity = new Fx.Style('polaroid_blank', 'opacity', {wait: false});
		newOpacity = (blank) ? 0.9999 : 0.0;

		return blankOpacity.start(newOpacity);
	}
};

window.addEvent('load', function () {
	$('polaroid_blank').setAttribute('src', 'images/polaroid_blank.gif');
});