方法/步骤

• 先打开flow.dwt，找到
  <!-- {if $goods.goods_id gt 0 && $goods.is_gift eq 0 && $goods.parent_id eq 0} 普通商品可修改数量 -->，把下面的input框里面的替换成
  

  
  

  <a href="javascript:;" onclick="red_num({$goods.rec_id},{$goods.goods_id});"> - </a><input type="text" name="goods_number[{$goods.rec_id}]" id="goods_number_{$goods.rec_id}" value="{$goods.goods_number}" size="4" class="inputBg" style="text-align:center " onblur="change_price({$goods.rec_id},{$goods.goods_id})"/><a href="javascript:;" onclick='add_num({$goods.rec_id},{$goods.goods_id})' >+</a>
  

• 然后在下一个</td>后加一段js代码
  

  <script type="text/javascript" charset="utf-8">

  function add_num(rec_id,goods_id)

  {

  document.getElementById("goods_number_"+rec_id+"").value++;

  var number = document.getElementById("goods_number_"+rec_id+"").value;

  Ajax.call('flow.PHP','step=update_group_cart&rec_id=' + rec_id +'&number=' + number+'&goods_id=' + goods_id,changePriceResp**e,'GET','JSON');

  }

  function red_num(rec_id,goods_id)

  {

  if (document.getElementById("goods_number_"+rec_id+"").value>1)

  {

  document.getElementById("goods_number_"+rec_id+"").value--;

  }

  var number = document.getElementById("goods_number_"+rec_id+"").value;

  Ajax.call('flow.PHP','JSON');

  }

  function change_price(rec_id,goods_id){

  var number = document.getElementById("goods_number_"+rec_id+"").value;

  //alert(number);

  Ajax.call('flow.PHP','JSON');

  }

  function changePriceResp**e(result)

  {

  if(result.error == 1)

  {

  alert(result.content);

  document.getElementById("goods_number_"+result.rec_id+"").value =result.number;

  }

  else

  {

  document.getElementById('subtotal_'+result.rec_id).innerHTML = result.subtotal;//商品总价

  document.getElementById('cart_amount_desc').innerHTML = result.cart_amount_desc;//购物车商品总价说明

  document.getElementById('market_amount_desc').innerHTML = result.market_amount_desc;//购物车商品总市价说明

  }

  }

  </script>

  
  

• 接着把下一行的

  <td align="right" bgcolor="#ffffff" >{$goods.subtotal}</td>

  替换为
  

  <td align="right" bgcolor="#ffffff" id="subtotal_{$goods.rec_id}">{$goods.subtotal}</td>

  
  
  找到{$shopping_money}和{$market_price_desc}，分别替换为

  <span id="cart_amount_desc">{$shopping_money}</span>

  和

  <span id="market_amount_desc">{$market_price_desc}</span>

  
  

  
  

• //二次开发，ajax更新购物车

  elseif($_REQUEST['step']=='update_group_cart')

  {

  include_once('includes/cls_json.PHP');

  $result = array('error' => 0,'message' => '','content' => '','goods_id' => '');

  $json = new JSON;

  $rec_id = $_GET['rec_id'];

  $number = $_GET['number'];

  $goods_id = $_GET['goods_id'];

  $result['rec_id'] = $rec_id;

  if ($GLOBALS['_CFG']['use_storage'] == 1)

  {

  $goods_number = $GLOBALS['db']->getOne("select goods_number from ".$GLOBALS['ecs']->table('goods')." where goods_id='$goods_id'");

  if($number>$goods_number)

  {

  $result['error'] = '1';

  $result['content'] ='对不起,您选择的数量超出库存您最多可购买'.$goods_number."件";

  $result['number']=$goods_number;

  die($json->encode($result));

  }

  }

  $sql = "UPDATE " . $GLOBALS['ecs']->table('cart') . " SET goods_number = '$number' WHERE rec_id = $rec_id";

  $GLOBALS['db']->query($sql);

  /* 取得商品列表，计算合计 */

  $cart_goods = get_cart_goods();

  $subtotal = $GLOBALS['db']->getONE("select goods_price * goods_number AS subtotal from ".$GLOBALS['ecs']->table('cart')." where rec_id = $rec_id");

  $result['subtotal'] = price_format($subtotal,false);

  $result['cart_amount_desc'] = sprintf($_LANG['shopping_money'],$cart_goods['total']['goods_price']);

  $result['market_amount_desc'] = sprintf($_LANG['than_market_price'],$cart_goods['total']['market_price'],$cart_goods['total']['saving'],$cart_goods['total']['save_rate']

  );

  die($json->encode($result));

  }