// JavaScript Document
function somenteNumeros(){
	if (window.event.keyCode >= 48 && window.event.keyCode <= 57)
		return true
	else
		window.event.keyCode = 0;
}

function formatar(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);
  }
}