/admin/goods_info.php 约计170行,修改按钮如图
<input name="promote_start_date" type="text" id="promote_start_date" size="19" value='{$goods.promote_start_date}' readonly="readonly" /><input name="selbtn1" type="button" id="selbtn1" onclick="return showCalendar('promote_start_date', '%Y-%m-%d %H:%M','24', false, 'selbtn1');" value="起始" class="button"/> - <input name="promote_end_date" type="text" id="promote_end_date" size="19" value='{$goods.promote_end_date}' readonly="readonly" /><input name="selbtn2" type="button" id="selbtn2" onclick="return showCalendar('promote_end_date', '%Y-%m-%d %H:%M','24', false, 'selbtn2');" value="结束" class="button"/>
最终效果如图: