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) {
		ui_nav_home_10 = newImage("image/ui-nav-home_10.gif");
		ui_nav_plantLibrary_11 = newImage("image/ui-nav-plantLibrary_11.gif");
		ui_nav_onlaStore_12 = newImage("image/ui-nav-onlaStore_12.gif");
		ui_nav_news_13 = newImage("image/ui-nav-news_13.gif");
		ui_centsTradeshow_14 = newImage("image/ui-centsTradeshow_14.gif");
		ui_nav_publications_15 = newImage("image/ui-nav-publications_15.gif");
		ui_nav_certification_16 = newImage("image/ui-nav-certification_16.gif");
		preloadFlag = true;
	}
}