function numerico()
	{
	if (event.keyCode < 48 || event.keyCode > 57)
		{
		event.keyCode = 0;
		event.returnValue = false;
		}
	}
function formata(src, mask) 
{
	var i = src.value.length;
	var saida = mask.substring(0,1);
	var texto = mask.substring(i)
	if (texto.substring(0,1) != saida) 
	  {
		src.value += texto.substring(0,1);
	  }
}