我有一个类似iOS的复选框样式，使用我想要更改网站语言的状态。我使用以下代码：langchange.js

$(document).ready(function(){
    $("#langfct").change(function() { 
        if($(this).is(":checked")) { 
            $.ajax({
                url: 'langfunc.php',
                type: 'POST',
                data: { langstate: "fr" }
            });
            alert('fr');
            window.location.reload();
        } else {
            $.ajax({
                url: 'langfunc.php',
                type: 'POST',
                data: { langstate: "en" }
            });
            alert('en');
            window.location.reload();
        }
    }); 
});

langfunc.php

<?php
    session_start ();
    $valang = $_POST['langstate'];
    $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
    if ($valang == fr){
        include("french.php");
    }elseif ($valang == en) {
        include("english.php");
    } else{

    switch ($lang){
        case "fr":
            //echo "PAGE FR";
            include("french.php");//include check session FR
            break;
        case "en":
            //echo "PAGE EN";
            include("english.php");
            break;        
        default:
            //echo "PAGE EN - Setting Default";
            include("english.php");//include EN in all other cases of different lang detection
            break;
    }
    }
    ?>

如何使用复选框的状态，保存langstate并重新加载数据？Thx