如何利用CSS给同一个网页中的超链接设置设置不同的样式

用css中的类。比如

<style type="text/css">
a.topcs:link {
font-size: 12px;
color: #000000;
text-decoration: none;
}
a.topcs:visited {
font-size: 12px;
color: #000000;
text-decoration: none;
}
a.topcs:hover {
font-size: 12px;
color: #FF0000;
text-decoration: none;
}
a.news:link {
font-size: 12px;
color: #000000;
text-decoration: none;
}
a.news:visited {
font-size: 12px;
color: #000000;
text-decoration: none;
}
a.news:hover {
font-size: 12px;
color: #FF0000;
text-decoration: none;
}</style>

调用

<a href="1.html" class="news">1</a><a href="2.html" class="topcs">1</a>