function acessar(endereco)
{
    var keycode = window.event.keyCode
    
    if(keycode == 27)
    {
        parent.conteudo.document.getElementById('inicioMenu').focus();
        parent.conteudo.document.getElementById('hdnKeyPress').value = keycode;
    }
    else if(keycode == 13)
    {
        window.location.href= endereco;
        parent.conteudo.document.getElementById('hdnKeyPress').value = keycode;
    }
    
    window.event.returnValue = false;
    return false;
}