function rotarBannerTinta()
{
bannerTinta="url(img/banner_tinta.gif)";
document.getElementById('banner').style.backgroundImage = bannerTinta;
document.getElementById('linkBanner').href = "?mnu=tintastock";
setTimeout("rotarBannerSeminario();",3000);
}

function rotarBannerSeminario()
{
bannerSeminario="url(img/banner_seminario.gif)";
document.getElementById('banner').style.backgroundImage = bannerSeminario;
document.getElementById('linkBanner').href = "?mnu=seminario";
setTimeout("rotarBannerTinta();",3000);
}