// rollover functions

function navBar_item (img_name, loc, width, height) {
	img_str = "../i/nav/" + loc + img_name;

	this.img_name_off = new Image (width, height);
	this.img_name_off.src = img_str + "_off.jpg";
	this.img_name_on = new Image (width, height);
	this.img_name_on.src = img_str + "_on.jpg";
}

function new_navBar_item (img_name, loc, width, height) {
	navBar_item [img_name] = new navBar_item (img_name, loc, width, height);
}

function tn_over (img_name) {
	document.images[img_name].src = navBar_item[img_name].img_name_on.src;
}

function tn_out (img_name) {
	document.images[img_name].src = navBar_item [img_name].img_name_off.src;
}

	new_navBar_item ("home", "tn/", 66, 91);
	new_navBar_item ("sitemap", "tn/", 69, 54);	
	new_navBar_item ("ctus", "tn/", 85, 67);
	new_navBar_item ("nw_mngment", "mn/", 150, 67);
	new_navBar_item ("cust_suppo", "mn/", 150, 67);
	new_navBar_item ("approach", "mn/", 150, 67);