image1 = new Image();
image1.src = "../imagens/bg_asfalto.jpg";
image2 = new Image();
image2.src = "../imagens/bt_nav1a_on.jpg";
image3 = new Image();
image3.src = "../imagens/bt_nav1b_on.jpg";
image4 = new Image();
image4.src = "../imagens/bt_nav1c_on.jpg";
image5 = new Image();
image5.src = "../imagens/bt_cz_on.jpg";
image6 = new Image();
image6.src = "../imagens/bt_lcl_on.jpg";
image7 = new Image();
image7.src = "../imagens/bt_obrcrs_on.jpg";
image8 = new Image();
image8.src = "../imagens/bt_obreal_on.jpg";