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_youngplants_4 = newImage("image/ui-nav-youngplants_4.gif");
		ui_nav_retailgardencenter_5 = newImage("image/ui-nav-retailgardencenter_5.gif");
		ui_nav_igcs_6 = newImage("image/ui-nav-igcs_6.gif");
		ui_nav_aboutus_11 = newImage("image/ui-nav-aboutus_11.gif");
		ui_nav_contactus_12 = newImage("image/ui-nav-contactus_12.gif");
		ui_nav_whatsnew_2 = newImage("image/ui-nav-whatsnew_2.gif");
		ui_nav_enews_2 = newImage("image/ui-nav-enews_2.gif");
		preloadFlag = true;
	}
}