ecshop相关配件怎么增加购买按钮

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!-- 开始循环属 关联的商品 {foreach from=$attribute_linked item=linked}-->
<!-- {if $linked.goods} -->
<div class="box">
 <div class="box_1">
  <h3><span title="{$linked.title}">{$linked.title|truncate:11:"...":true}</span></h3>
  <div class="boxCenterList clearfix">
  <!-- {foreach from=$linked.goods item=linked_goods_data} -->
  <ul class="clearfix">
    <li class="goodsimg">
    <a href="{$linked_goods_data.url}" target="_blank"><img src="{$linked_goods_data.goods_thumb}" alt="{$linked_goods_data.name|escape:html}" class="B_blue" /></a>
    </li>
    <li>
    <a href="{$linked_goods_data.url}" target="_blank" title="{$goods.linked_goods_data_name|escape:html}">{$linked_goods_data.short_name|escape:html}</a><br />
      {$lang.shop_price}<font class="f1">{$linked_goods_data.shop_price}</font><br />
<a href="javascript:addToCart({$goods.goods_id},{$goods.parent_id})"><img src="images/bnt_buy.gif"  /></a>
    </li>
    </ul>
  <!-- {/foreach} -->
  </div>
 </div>
</div>
<div class="blank5"></div>
<!-- {/if} -->
<!-- 结束属 关联的商品 {/foreach}-->