if (document.images) {

// Level One Navigation Buttons ==================================
img1on = new Image(); img1on.src = "http://www.fractoweb.com.br/img/l1_products_r.gif";
img1off = new Image(); img1off.src = "http://www.fractoweb.com.br/img/l1_products.gif";

img2on = new Image(); img2on.src = "http://www.fractoweb.com.br/img/l1_purchase_r.gif";
img2off = new Image(); img2off.src = "http://www.fractoweb.com.br/img/l1_purchase.gif";

img3on = new Image(); img3on.src = "http://www.fractoweb.com.br/img/l1_downloads_r.gif";
img3off = new Image(); img3off.src = "http://www.fractoweb.com.br/img/l1_downloads.gif";

img4on = new Image(); img4on.src = "http://www.fractoweb.com.br/img/l1_clientes_r.gif";
img4off = new Image(); img4off.src = "http://www.fractoweb.com.br/img/l1_clientes.gif";

img5on = new Image(); img5on.src = "http://www.fractoweb.com.br/img/l1_support_r.gif";
img5off = new Image(); img5off.src = "http://www.fractoweb.com.br/img/l1_support.gif";

img6on = new Image(); img6on.src = "http://www.fractoweb.com.br/img/l1_company_r.gif";
img6off = new Image(); img6off.src = "http://www.fractoweb.com.br/img/l1_company.gif";

}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
	}
  }
}