测可用！ecshop立即购买和加入购物车按钮共存的方法

网上方法很多，但都不能用的，有的是老版本的，有的方法本身就不完整。
应大多数客户要求，我们重新整理下教程，希望对大家有用。
亲测可用！ecshop立即购买和加入购物车按钮共存的方法

第一步：修改ecshop模板文件：goods.dwt模板
<a href="javascript:addToCart1({$goods.goods_id})"><img src="data:images/bnt_cat.gif" />
(提示：是在购物车按钮旁边增加个：立即购买)
亲测可用！ecshop立即购买和加入购物车按钮共存的方法

第二步：修改ecshop系统的js文件：js/common.js
function addToCart1(goodsId, parentId)
{
  var goods        = new Object();
  var spec_arr     = new Array();
  var fittings_arr = new Array();
  var number       = 1;
  var formBuy      = document.forms['ECS_FORMBUY'];
  var quick     = 0;
  // 检查是否有商品规格
  if (formBuy)
  {
    spec_arr = getSelectedAttributes(formBuy);
    if (formBuy.elements['number'])
    {
      number = formBuy.elements['number'].value;
    }
 quick = 1;
  }
  goods.quick    = quick;
  goods.spec     = spec_arr;
  goods.goods_id = goodsId;
  goods.number   = number;
  goods.parent   = (typeof(parentId) == "undefined") ? 0 : parseInt(parentId);
  Ajax.call('flow.php?step=add_to_cart1', 'goods=' + goods.toJSONString(), addToCartResponse1, 'POST', 'JSON');
}
function addToCartResponse1(result)
{
  if (result.error > 0)
  {
    // 如果需要缺货登记，跳转
    if (result.error == 2)
    {
      if (confirm(result.message))
      {
        location.href = 'user.php?act=add_booking&id=' + result.goods_id + '&spec=' + result.product_spec;
      }
    }
    // 没选规格，弹出属性选择框
    else if (result.error == 6)
    {
      openSpeDiv(result.message, result.goods_id, result.parent);
    }
    else
    {
      alert(result.message);
    }
  }
  else
  {
    var cartInfo = document.getElementById('ECS_CARTINFO');
    var cart_url = 'flow.php?step=cart';
    if (cartInfo)
    {
      cartInfo.innerHTML = result.content;
    }
 location.href = cart_url;

  }
}

3第三步:flow.php
elseif ($_REQUEST['step'] == 'add_to_cart1')
{
    include_once('includes/cls_json.php');
    $_POST['goods'] = json_str_iconv($_POST['goods']);
    if (!empty($_REQUEST['goods_id']) && empty($_POST['goods']))
    {
        if (!is_numeric($_REQUEST['goods_id']) || intval($_REQUEST['goods_id']) <= 0)
        {
            ecs_header("Location:./\n");
        }
        $goods_id = intval($_REQUEST['goods_id']);
        exit;
    }
    $result = array('error' => 0, 'message' => '', 'content' => '', 'goods_id' => '');
    $json  = new JSON;
    if (empty($_POST['goods']))
    {
        $result['error'] = 1;
        die($json->encode($result));
    }
    $goods = $json->decode($_POST['goods']);
    /* 检查：如果商品有规格，而post的数据没有规格，把商品的规格属性通过JSON传到前台 */
    if (empty($goods->spec) AND empty($goods->quick))
    {
        $sql = "SELECT a.attr_id, a.attr_name, a.attr_type, ".
            "g.goods_attr_id, g.attr_value, g.attr_price " .
        'FROM ' . $GLOBALS['ecs']->table('goods_attr') . ' AS g ' .
        'LEFT JOIN ' . $GLOBALS['ecs']->table('attribute') . ' AS a ON a.attr_id = g.attr_id ' .
        "WHERE a.attr_type != 0 AND g.goods_id = '" . $goods->goods_id . "' " .
        'ORDER BY a.sort_order, g.attr_price, g.goods_attr_id';
        $res = $GLOBALS['db']->getAll($sql);
        if (!empty($res))
        {
            $spe_arr = array();
            foreach ($res AS $row)
            {
                $spe_arr[$row['attr_id']]['attr_type'] = $row['attr_type'];
                $spe_arr[$row['attr_id']]['name']     = $row['attr_name'];
                $spe_arr[$row['attr_id']]['attr_id']     = $row['attr_id'];
                $spe_arr[$row['attr_id']]['values'][] = array(
                                                            'label'        => $row['attr_value'],
                                                            'price'        => $row['attr_price'],
                                                            'format_price' => price_format($row['attr_price'], false),
                                                            'id'           => $row['goods_attr_id']);
            }
            $i = 0;
            $spe_array = array();
            foreach ($spe_arr AS $row)
            {
                $spe_array[]=$row;
            }
            $result['error']   = ERR_NEED_SELECT_ATTR;
            $result['goods_id'] = $goods->goods_id;
            $result['parent'] = $goods->parent;
            $result['message'] = $spe_array;
            die($json->encode($result));
        }
    }

    /* 检查：商品数量是否合法 */
    if (!is_numeric($goods->number) || intval($goods->number) <= 0)
    {
        $result['error']   = 1;
        $result['message'] = $_LANG['invalid_number'];
    }
    /* 更新：购物车 */
    else
    {
        // 更新：添加到购物车
        if (addto_cart($goods->goods_id, $goods->number, $goods->spec, $goods->parent))
        {
            if ($_CFG['cart_confirm'] > 2)
            {
                $result['message'] = '';
            }
            else
            {
                $result['message'] = $_CFG['cart_confirm'] == 1 ? $_LANG['addto_cart_success_1'] : $_LANG['addto_cart_success_2'];
            }
            $result['content'] = insert_cart_info();
            $result['one_step_buy'] = $_CFG['one_step_buy'];
        }
        else
        {
            $result['message']  = $err->last_message();
            $result['error']    = $err->error_no;
            $result['goods_id'] = stripslashes($goods->goods_id);
            if (is_array($goods->spec))
            {
                $result['product_spec'] = implode(',', $goods->spec);
            }
            else
            {
                $result['product_spec'] = $goods->spec;
            }
        }
    }
    $result['confirm_type'] =3;
    die($json->encode($result));
}