隨手一敲爛代碼?哈哈哈??大概就是算差價再用jquery改變對應的內容
var?success=function(result){
????if(result.state==1){
????????$(function?()?{
????????????//原來的總價
????????????var?total?=??parseInt($("#total").html());
????????????//得到那個小計
????????????var?price?=parseInt($("#newsum-"+product_id).html());
????????????//得到和之前的差價
????????????var?sub=result.sum-price;
????????????//得到新的總價
????????????var?newtotal=total+sub;
????????????$("#newsum-"+product_id).html(result.sum);
????????????//修改總價
????????????$("#total").html(newtotal);
????????});

第一 添加class? id

<td align="center" bgcolor="#ffffff" >￥<span class="totle" id="total-<?php echo $product['id'] ?>"><?php echo $product['num']*$product['price'] ?></span>元</td>

<td bgcolor="#ffffff">
?????????? <span id="total2">購物金額小計 ￥<?php echo $total ?>元</span>??????????? ?
?</td>

第二 添加js

if(response.errno == 0){
??????????????????????????? var price = ($("#product-"+productid).val())*($("#p-"+productid).html());
??????????????????????????? $("#total-"+productid).html(price);
??????????????????????????? var sum = 0;
??????????????????????????? $(".totle").each(function() {
????????????????????????????? sum += parseFloat($(this).text());
??????????????????????????? $("#total2").text("￥"+sum+"元");
????? })
}

<dd>
?????? <strong>購買數量：</strong>
??????? <input name="number" type="text" id="number"? onblur="changeNumber(<?php echo $data['id']?>,this.value)" value="1" size="4" onblur="" style="border:1px solid #ccc; "> <strong>商品總價：</strong><font id="totalPrice" class="f1">￥2588元</font>
?????? </dd>

<script type="text/javascript">
??????? function changeNumber(){
????????????? var num = parseInt($("#number").val());
????????????? var sellPrice = <?php echo $data['price']?>;
????????????? $("#totalPrice").html("￥"+num*sellPrice+"元");
??????? }
????? </script>

我是修改的產品頁面中的總價格

我弄好了

你猜呀！