function validaCPF(cpf)
{
    if (cpf.length < 9)
        return false;
        
    var nonNumbers = /\D/;
    
    if (nonNumbers.test(cpf))
        return false;
        
    if (cpf == "000000000" || cpf == "111111111" || cpf == "222222222" || cpf == "33333333" || cpf == "44444444" || cpf == "555555555" || cpf == "666666666" || cpf == "777777777" || cpf == "888888888" || cpf == "999999999")
        return false;
   
return true;
}