function habilita(form)

{ 
form.odeporte[0].disabled = false;
form.odeporte[1].disabled = false;
form.odeporte[2].disabled = false;
form.odeporte[3].disabled = false;
}

function deshabilita(form)
{ 
form.odeporte[0].disabled = true;
form.odeporte[1].disabled = true;
form.odeporte[2].disabled = true;
form.odeporte[3].disabled = true;
}