给select增加placeholder技巧

1.使用默认option再隐藏此选项

<select>  
    <option value='' disabled selected style='display:none;'>Please Choose</option>  
    <option value='0'>Open when powered (most valves do this)</option>  
    <option value='1'>Closed when powered, auto-opens when power is cut</option>  
</select>

 

posted @ 2016-08-19 13:33  G善源  阅读(214)  评论(0)  编辑  收藏  举报