function showSubmenu( elemento )
{
    document.getElementById( "submenuPrincipal" ).style.display = "none";
    document.getElementById( "submenuProjeto" ).style.display = "none";
    document.getElementById( "submenuCancer" ).style.display = "none";
    document.getElementById( "submenuMultimidia" ).style.display = "none";
    document.getElementById( "submenuFilme" ).style.display = "none";
    
    document.getElementById( elemento ).style.display = "block";
}