var img1 = new Image;
var img2 = new Image;
var img3 = new Image;
var img4 = new Image;
var img5 = new Image;
img1.src = "imagens/menu_int_home_over.gif";
img2.src = "imagens/menu_int_aempresa_over.gif";
img3.src = "imagens/menu_int_obras_over.gif";
img4.src = "imagens/menu_int_qualificacao_over.gif";
img5.src = "imagens/menu_int_contatos_over.gif";