function validar(email){
    var filter = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
    if(filter.test(email))
      return true;
    else{
      return false;
	  alert("E-mail inválido!")
    }
  }