例如添加一件商品后，某個div顯示當前的商品數量?<div?class="pay"> ????????????????<div?class="pay-opt">?<a?href="home2.html"><span?class="am-icon-home?am-icon-fw">首頁</span></a>?<a><span?class="am-icon-heart?am-icon-fw">收藏</span></a>?</div> ????????????????<li> ????????????????????<div?class="clearfix?tb-btn?tb-btn-buy?theme-login">?<a?id="LikBuy"?title="點此按鈕到下一步確認購買信息"?href="#">立即購買</a>?</div> ????????????????????<div?id="test1"></div> ????????????????</li> ????????????????<li> ????????????????????<div?class="clearfix?tb-btn?tb-btn-basket?theme-login">?<a?id="LikBasket"?title="加入購物車"?href="javascript:addCart({$rst[0]['g_id']})"?onClick="showSum()"><i></i>加入購物車</a>?</div> ????????????????</li> ????????????</div> ????????</div> ????????<div?class="clear"></div> ????</div> ???{literal}?<script?type="text/javascript"> ?????????? ??????????function?showSum(){ ??????????????var?url?=?"countShopcartid.php"; ??????????????? ??????????????? ?????????????var?data?=?{"not":""}; ??????????????var?success=?function(response){ ??????????????????if(response.errno?==?0){ ????????????????????var?sum?=?response.sum;? ????????????????????alert(sum); ??????????????????$("#test1").html(sum); ??????????????????}else ??????????????????{ ???????????????????????alert('獲取購物車商品數量失敗'); ??????????????????} ??????????????} ??????????????$.post(url,data,success,"json"); ??????????} ????</script>{/literal}countShopcartid.php <?php ? require_once('include.php'); //1.接受參數并處理 ? $user_id?=?$_SESSION["id"]; //2.計算數量 $sql?=?"select?count(*)?from?shopcar?where??user_id='{$user_id}'"; $row?=?$admindb->ExecSQL($sql,$conn); var_dump($row); //3.返回處理結果 if($row){ ????$response?=?array( ????????'errno'?=>0, ????????'errmsg'?=>'success', ????????'data'?=>?true, ????????'sum'?=>?$row[0]["count(*)"], ????); } else{ ????$response?=?array( ????????'errno'?=>-1, ????????'errmsg'?=>'fail', ????????'data'?=>?false, ????????'sum'?=>?$row[0]["count(*)"], ????); } echo?json_encode($response);??? ?>f12看到sum有值{"errno":0,"errmsg":"success","data":true,"sum":"2"}就是傳不到test1這個div里