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) {
		new_logo2.jpg = newImage("images/new_logo2.jpg");
		nav1_hm_over = newImage("images/nav1_hm-over.gif");
		nav1_comp_over = newImage("images/nav1_comp-over.gif");
		nav1_qulty_over = newImage("images/nav1_qulty-over.gif");
		nav1_ind_over = newImage("images/nav1_ind-over.gif");
		nav1_comm_over = newImage("images/nav1_comm-over.jpg");
		nav1_res_over = newImage("images/nav1_res-over.jpg");
		nav1_gen_over = newImage("images/nav1_gen-over.jpg");
		nav1_contact_over = newImage("images/nav1_contact-over.gif");
		preloadFlag = true;
	}
}