php中點擊網頁不跳轉執行程序

if($code['result_code'] !='FAIL')
    {
        echo "<script type='text/javascript'>
        alert('退款成功,請耐心等待');history.back();
    </script>";
        //echo "退款成功";
        ; 
    }else{
        echo "<script type='text/javascript'>
        alert('退款失敗,請聯系客服~~~');history.back();
    </script>";
    
    }