rotate_image = new Image	
		var show
		var previous
		var next
		var navImages = new Array("1new.jpg","2new.jpg","3new.jpg","4new.jpg","5new.jpg","6new.jpg","7new.jpg","8new.jpg","9new.jpg","10new.jpg","11new.jpg","12new.jpg");
		var numImgs=navImages.length;
		var ran_number = Math.floor(Math.random() * numImgs);