var preloaded = [];

		// here is a lame preloading script i am putting in just for demonstration
		 for (var i = 1; i <= 8; i++) {
			preloaded[i] = [loadImage(i + "-0.gif"), loadImage(i + "-1.gif")];
		 }

		

		// this is a crappy example preloader. Use whichever one you want.
		 function loadImage(sFilename) {
			 var img = new Image();
			 img.src ="_images/nav/" + sFilename;
			return img;
		 }

		// this is a crappy example image swapper. Use whichever you want.
		 function swapImage(imgName, sFilename) {
			 document.images[imgName].src = sFilename;
		 }