function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_14_over = newImage("/images/nav/14-over.gif");
		nav_17_over = newImage("/images/nav/17-over.gif");
		nav_20_over = newImage("/images/nav/20-over.gif");
		nav_23_over = newImage("/images/nav/23-over.gif");
		nav_26_over = newImage("/images/nav/26-over.gif");
		nav_29_over = newImage("/images/nav/29-over.gif");
		nav_36_over = newImage("/images/nav/36-over.gif");
		nav_37_over = newImage("/images/nav/37-over.gif");
		preloadFlag = true;
	}
}