【转】实现上下scroll的小鸟
http://www.cnblogs.com/zengxiangzhan/archive/2011/08/01/2124377.html
关键
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<div id="fixedMenu"></div>
<script type="text/javascript" src="https://files.cnblogs.com/zengxiangzhan/scrollTo.js"></script>
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background:url("http://images.cnblogs.com/cnblogs_com/zengxiangzhan/img/twitter.png") repeat scroll 0 0 transparent;
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position:fixed;
right:0;
width:80px;
z-index:29;
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