if (document.images) {
	nav_cell_g = new Image();
	nav_cell_g.src = "images/nav_cell_01.gif";
	nav_cell_g_over = new Image();
	nav_cell_g_over.src = "images/nav_cell_01_over.gif";
	nav_cell_s = new Image();
	nav_cell_s.src = "images/nav_cell_05.gif";
	nav_cell_s_over = new Image();
	nav_cell_s_over.src = "images/nav_cell_05_over.gif";
	tnail = new Image();
	tnail.src = "images/tnail_home.gif";
	home_on = new Image();
	home_on.src = "images/tnail_home.gif";
	home_about = new Image();
	home_about.src = "images/tnail_home_about.gif";
	home_process = new Image();
	home_process.src = "images/tnail_home_process.gif";
	home_help = new Image();
	home_help.src = "images/tnail_home_helpfuladvice.gif";
	home_contact = new Image();
	home_contact.src = "images/tnail_home_contact.gif";
	stock_on = new Image();
	stock_on.src = "images/tnail_stock.gif";
	stock_catalog = new Image();
	stock_catalog.src = "images/tnail_stock_catalog.gif";
	cust_on = new Image();
	cust_on.src = "images/tnail_custom.gif";
	cust_perm = new Image();
	cust_perm.src = "images/tnail_custom_perm.gif";
	cust_promo = new Image();
	cust_promo.src = "images/tnail_custom_promo.gif";
	cust_semi = new Image();
	cust_semi.src = "images/tnail_custom_semi.gif";
	cust_package = new Image();
	cust_package.src = "images/tnail_custom_package.gif";
	cust_sign = new Image();
	cust_sign.src = "images/tnail_custom_sign.gif";
	cust_ceiling = new Image();
	cust_ceiling.src = "images/tnail_custom_ceiling.gif";
	cust_signage = new Image();
	cust_signage.src = "images/tnail_custom_signage.gif";
	cust_central = new Image();
	cust_central.src = "images/tnail_custom_central.gif";
}

function flip() {
	if (document.images) {
		var num_arg = arguments.length;
		if (num_arg == 0 || (num_arg % 2) != 0) return;
		for (var i=0; i<num_arg; i) {
			var j = i+1;
			var imgname = arguments[i];
			var imgsrc = arguments[j];
			document.images[imgname].src = eval(imgsrc+'.src');
			i+=2;
		}
	}
}