function MudarCodigoPostal(campo)
{
	if (campo.value.length == 4)
	{
		document.getElementById('txtCodigoPostal3').focus();
	}
}
	
function numbersonly(myfield, e, dec)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);

// control keys
if ((key==null) || (key==0) || (key==8) || 
    (key==9) || (key==13) || (key==27) )
   return true;

// numbers
else if ((("0123456789").indexOf(keychar) > -1))
   return true;

// decimal point jump
else if (dec && (keychar == "."))
   {
   myfield.form.elements[dec].focus();
   return false;
   }
else
   return false;
   
}

function VerificarOcupacao()
{
	Ocupacao = document.getElementById('txtOcupacao');
	Nivel = document.getElementById('nivel');
	Estudo = document.getElementById('Area');
	if (Ocupacao.options.selectedIndex == 1 || Ocupacao.options.selectedIndex == 2)
	{
		Nivel.style.display = 'block';
		VerificarNivel();
	}
	else
	{
		Nivel.style.display = 'none';
		Estudo.style.display = 'none';
	}
}

function VerificarNivel()
{
	Nivel = document.getElementById('txtGrau');
	Area_Estudo = document.getElementById('Area');
	if (Nivel.selectedIndex == 2 || Nivel.selectedIndex == 3)
	{
		Area_Estudo.style.display = 'block';
	}
	else
	{
		Area_Estudo.style.display = 'none';
	}
}