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) {
		leftnav_02_over = newImage("images/leftnav_02-over.gif");
		leftnav_03_over = newImage("images/leftnav_03-over.gif");
		leftnav_04_over = newImage("images/leftnav_04-over.gif");
		leftnav_05_over = newImage("images/leftnav_05-over.gif");
		leftnav_06_over = newImage("images/leftnav_06-over.gif");
		leftnav_07_over = newImage("images/leftnav_07-over.gif");
		leftnav_09_over = newImage("images/leftnav_09-over.gif");
		leftnav_10_over = newImage("images/leftnav_10-over.gif");
		leftnav_11_over = newImage("images/leftnav_11-over.gif");
		leftnav_12_over = newImage("images/leftnav_12-over.gif");
		leftnav_13_over = newImage("images/leftnav_13-over.gif");
		leftnav_14_over = newImage("images/leftnav_14-over.gif");
		leftnav_15_over = newImage("images/leftnav_15-over.gif");
		leftnav_16_over = newImage("images/leftnav_16-over.gif");
		leftnav_17_over = newImage("images/leftnav_17-over.gif");
		preloadFlag = true;
	}
}