window.onerror = null;
var netscape = 0;
var goodIE = 0;
browserName = navigator.appName.substring(0,8);
browserVer = parseFloat(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3)
{ netscape = 1; }
if (browserName == "Microsof" && browserVer >= 4)
{ goodIE = 1; }

if (netscape || goodIE) {
names = new Array(  "cero" , "uno", "dos", "tres", "cuatro", "cinco", "seis", "siete", "ocho", "nueve", "diez", "once", "doce");
        buttons = new Array(26);
for (m=0; m<=25; m++) {
buttons[m] = new Image(); }
        buttons[0].src = "img/bot_nosotros_0.gif";
        buttons[1].src = "img/bot_nosotros_1.gif";
        buttons[2].src = "img/bot_contactenos_0.gif";
        buttons[3].src = "img/bot_contactenos_1.gif";
        buttons[4].src = "img/bot_mapa_sitio_0.gif";
        buttons[5].src = "img/bot_mapa_sitio_1.gif";
        buttons[6].src = "img/bot_inicio_0.gif";
        buttons[7].src = "img/bot_inicio_1.gif";
        buttons[8].src = "img/bot_novedades_0.gif";
        buttons[9].src = "img/bot_novedades_1.gif";
        buttons[10].src = "img/bot_libros_0.gif";
        buttons[11].src = "img/bot_libros_1.gif";
        buttons[12].src = "img/bot_textos_0.gif";
        buttons[13].src = "img/bot_textos_1.gif";
        buttons[14].src = "img/bot_infantiles_0.gif";
	buttons[15].src = "img/bot_infantiles_1.gif";
	buttons[16].src = "img/bot_ofertas-saldos_0.gif";
	buttons[17].src = "img/bot_ofertas-saldos_1.gif";
	buttons[18].src = "img/bot_agotados_0.gif";
        buttons[19].src = "img/bot_agotados_1.gif";
	buttons[20].src = "img/bot_a_pedido_0.gif";
        buttons[21].src = "img/bot_a_pedido_1.gif";
	buttons[22].src = "img/bot_como_comprar.gif";
        buttons[23].src = "img/bot_como_comprar1.gif";
	buttons[24].src = "img/bot_gastos_envio.gif";
        buttons[25].src = "img/bot_gastos_envio1.gif";
        }
        


function swap(des,num) {
if (netscape || goodIE) {
document.images[names[des]].src = buttons[num].src;  }}