//	swaps an image
function swapImage(imgName,swapSrc) {
	if (document.images[imgName]) {
		eval("document." + imgName + ".src = \"" + swapSrc + "\"");
	} else { // try referenceing image on a layer
		numLayers = document.layers.length;
		for (x=0;x<numLayers;x++) {
			thisImg = document.layers[x].document.images[imgName];
			if (thisImg) thisImg.src = swapSrc;
		}
	}
}