function lo(){
	//login = document.getElementById('usuario');
	
	//login.value = (login.value != "") ? "" : "";
};

function se(){
	senha = document.getElementById('pwd');
	
	senha.value = (senha.value != "") ? "" : "";
};

emailRE = new RegExp("^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$");

function validaEmail() {
  var email = document.getElementById("email");
  if (!emailRE.test(email.value)) {
	alert("E-mail inválido!!!");
	document.getElementById("email").focus();
	return false
  }
}