a 标签

<style type = “text/css”>
<!--
a {font-size:16px}
a:link {color: blue; text-decoration:none;} //未访问：蓝色、无下划线
a:active:{color: red; } //激活：红色
a:visited {color:purple;text-decoration:none;} //已访问：紫色、无下划线
a:hover {color: red; text-decoration:underline;} //鼠标移近：红色、下划线
-->
</style>

 

对超链接下划线设置 使用代码"text-decoration"
语法： 
text-decoration : none || underline || blink || overline || line-through