CSS實現選中圖片效果

HTML

<div class="transparent_block" id="default">
    <img class="transparent" src="http://pic.616pic.com/ys_img/00/66/73/cTnkWv7ZqX.jpg"/>
</div>

CSS

img.transparent {width: 200px; height: 200px;margin: auto 5px;}
#default {background: #fff url(./static/admin/img/icon-success.png) no-repeat center center;}
#default img.transparent {filter:alpha(opacity=30);moz-opacity:.30;opacity:.30;}