Wie implementiert Imperial ECMS AJAX, ohne es zu aktualisieren und in den Warenkorb zu legen?

<script type="text/javascript" src="[!--news.url--]skin/default/js/jquery.js"></script>
<script type="text/javascript" src="[!--news.url--]skin/default/js/addBuyCar.js"></script>
<script type="text/javascript">
    var newsurl=&#39;<?=$public_r[newsurl]?>&#39;;
</script>

<a href="#ecms" onclick="AddProduct([!--classid--],[!--id--]);">加入购物车</a>

function AddProduct(classid, id) {
    $.ajax({
        type: "post",
        url: newsurl + "e/template/ShopSys/addBuyCar.php",
        data: "classid=" + classid + "&id=" + id,
        dataType: "json",
        success: function (json) {
            alert(json.msg);
        }
    })
}

<?php 
 require("../../class/connect.php");
 require("../../class/db_sql.php");
 require("../../data/dbcache/class.php");
 require("../../class/ShopSysFun.php");
 $link=db_connect();
 $empire=new mysqlquery();
</p> <p>//$_POST $classid=(int)$_POST[&#39;classid&#39;];
 $id=(int)$_POST[&#39;id&#39;];
</p> <p>//add function function json_AddBuycar($classid, $id) {
    global $class_r, $empire, $dbtbpre, $public_r;
    $classid=(int)$classid;
    $id=(int)$id;
    if(empty($classid)||empty($id)||empty($class_r[$classid][tbname])) {
        return json_encode(array(&#39;msgid&#39;=>1, &#39;msg&#39;=>&#39;此商品不存在&#39;));
    }
    //验证产品是否存在 $num=$empire->gettotal("select count(*) as total from {$dbtbpre}ecms_".$class_r[$classid][tbname]." where classid=&#39;$classid&#39; and id=&#39;$id&#39; limit 1");
    if(!$num) {
        return json_encode(array(&#39;msgid&#39;=>1, &#39;msg&#39;=>&#39;此商品不存在&#39;));
    }
    $record="!";
    $field="|";
    $productid=$classid.",".$id;
    $buycar=getcvar(&#39;mybuycar&#39;);
    //重复 if(strstr($buycar, "|".$productid."|")) {
        $pr=explode("|".$productid."|", $buycar);
        $pr1=explode("!", $pr[1]);
        $oldbuycar="|".$productid."|".$pr1[0]."!";
        //数量 $pr1[0]=ReturnBuycarProductNum($pr1[0]);
        if(empty($pr1[0])) {
            $pr1[0]=1;
        }
        $newnum=$pr1[0]+1;
        $newbuycar="|".$productid."|".$newnum."!";
        $buycar=str_replace($oldbuycar, $newbuycar, $buycar);
    }
    else {
        //只存放一个 if($public_r[&#39;buycarnum&#39;]==1) {
            $buycar=&#39;&#39;;
        }
        $buycar.="|".$productid."|1!";
    }
    $re=SetBuycar($buycar);
    if($re) {
        return json_encode(array(&#39;msgid&#39;=>2, &#39;msg&#39;=>&#39;商品加入购物车成功&#39;));
    }
}
echo json_AddBuycar($classid, $id);
 db_close();
 $empire=null;
 ?>