一个实现字体大中小方法的JavaScript代码

<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>实现字体大中小的另一种方法</title> <style type="text/css"> </style> <div class="fontsize" id="fs12" style="display: none"> <a href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbWphdmFzY3JpcHQ6ZG96b29tKDE2KQ==" target="_blank" rel="nofollow">大</a> <a href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbWphdmFzY3JpcHQ6ZG96b29tKDE0KQ==" target="_blank" rel="nofollow">中</a> <span>小</span> </div> <div class="fontsize" id="fs14"> <a href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbWphdmFzY3JpcHQ6ZG96b29tKDE2KQ==" target="_blank" rel="nofollow">大</a> <span>中</span> <a href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbWphdmFzY3JpcHQ6ZG96b29tKDEyKQ==" target="_blank" rel="nofollow">小</a> </div> <div class="fontsize" id="fs16" style="display: none"> <span>大</span> <a href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbWphdmFzY3JpcHQ6ZG96b29tKDE0KQ==" target="_blank" rel="nofollow">中</a> <a href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbWphdmFzY3JpcHQ6ZG96b29tKDEyKQ==" target="_blank" rel="nofollow">小</a> </div> <div id="contenttext">我是你的玫瑰花</div>
[ctrl+a 全选 注:如需引入外部js需刷新才能执行]