function ocultar(nome) {
    if (document.getElementById) {
        document.getElementById(nome).style.display = "none";
    } else if (document.all) {
        document.all[nome].style.display = "none";
    } else if(document.layers) {
        document[nome].style.display = "none";
    }
}

function mostrar(nome) {
    if (document.getElementById) {
        document.getElementById(nome).style.display = "";
    } else if (document.all) {
        document.all[nome].style.display = "";
    } else if(document.layers) {
        document[nome].style.display = "";
    } 
}