function checkMail(mail){
        var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
        if(typeof(mail) == "string"){
                if(er.test(mail)){ return true; }
        }else if(typeof(mail) == "object"){
                if(er.test(mail.value)){ 
                                        return true; 
                                }
        }else{
                return false;
                }
}

function valida_cpf(cpf){
      var numeros, digitos, soma, i, resultado, digitos_iguais;
      digitos_iguais = 1;
      if (cpf.length < 11)
            return false;
      for (i = 0; i < cpf.length - 1; i++)
            if (cpf.charAt(i) != cpf.charAt(i + 1))
                  {
                  digitos_iguais = 0;
                  break;
                  }
      if (!digitos_iguais)
            {
            numeros = cpf.substring(0,9);
            digitos = cpf.substring(9);
            soma = 0;
            for (i = 10; i > 1; i--)
                  soma += numeros.charAt(10 - i) * i;
            resultado = soma % 11 < 2 ? 0 : 11 - soma % 11;
            if (resultado != digitos.charAt(0))
                  return false;
            numeros = cpf.substring(0,10);
            soma = 0;
            for (i = 11; i > 1; i--)
                  soma += numeros.charAt(11 - i) * i;
            resultado = soma % 11 < 2 ? 0 : 11 - soma % 11;
            if (resultado != digitos.charAt(1))
                  return false;
            return true;
            }
      else
            return false;
}


function validateCaptcha()
{
    challengeField = $("input#recaptcha_challenge_field").val();
    responseField = $("input#recaptcha_response_field").val();
    //console.log(challengeField);
    //console.log(responseField);
    //return false;
    var html = $.ajax({
        type: "POST",
        url: "includes/ajax/ajax.recaptcha.php",
        data: "recaptcha_challenge_field=" + challengeField + "&recaptcha_response_field=" + responseField,
        async: false
    }).responseText;
    //console.log( html );
    if(html == "success") {
            //Add the Action to the Form
            //$("form").attr("action", "http://action/to/the/form_handler");
            //Indicate a Successful Captcha
            $("#captchaStatus").html("Success!");
            Recaptcha.reload();            
            // Uncomment the following line in your application
            return true;
        } else {
            $("#captchaStatus").html("The security code you entered did not match. Please try again.");
            Recaptcha.reload();
            return false;
    }
}