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_plantsearch_11 = newImage("image/ui-nav-plantsearch_11.jpg");
		ui_nav_ourPlants_12 = newImage("image/ui-nav-ourPlants_12.jpg");
		ui_nav_availability_13 = newImage("image/ui-nav-availability_13.jpg");
		ui_nav_aboutus_14 = newImage("image/ui-nav-aboutus_14.jpg");
		ui_nav_ourStaff_15 = newImage("image/ui-nav-ourStaff_15.jpg");
		ui_nav_contact_16 = newImage("image/ui-nav-contact_16.jpg");
		ui_nav_workingWithUs_17 = newImage("image/ui-nav-workingWithUs_17.jpg");
		preloadFlag = true;
	}
}