css三級下拉導航選單程式碼例項

admin發表於2017-04-14
CSS

分享一段程式碼例項，它實現了三級下拉導航選單效果。

這樣的功能在實際應用中還是非常普遍的。

程式碼例項如下:

[HTML] 純文字檢視 複製程式碼
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>螞蟻部落</title>
<style>
* {
  margin: 0;
  padding: 0;
}
body {
  background: #f5f5f5;
  color: #000;
  font-size: 12px;
  font-style: normal;
}
li {
  list-style: none;
}
a {
  text-decoration: none;
  color: #f50;
}
a:hover {
  text-decoration: underline;
  color: #f50;
}
.clearfix:before,
.clearfix:after {
  display: table;
  content: '';
}
.clearfix:after {
  clear: both;
}
.flt {
  float: left;
}
.frt {
  float: right;
}
 
.navbox {
  width: 960px;
  height: 40px;
  margin: 20px auto;
  background: #08c;
}
.navbox > ul > li {
  float: left;
  width: 160px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  font-size: 16px;
}
.navbox ul li a {
  display: block;
  color: #fff;
  background: #08c;
}
.navbox ul li a:hover {
  text-decoration: none;
  background: #00bfff;
}
.navbox ul li:hover .subnav {
  display: block;
}
.subnav > li {
  position: relative;
}
.threenav {
  position: absolute;
  top: 0;
  left: 160px;
  width: 160px;
}
.subnav, .threenav {
  display: none;
}
.subnav li:hover .threenav {
  display: block;
}
</style>
</head>
<body>
  <div class="navbox">
    <ul class="clearfix">
      <li><a href="#">螞蟻部落一</a></li>
      <li><a href="#">螞蟻部落二</a></li>
      <li>
        <a href="#">螞蟻部落三</a>
        <ul class="subnav">
          <li><a href="#">HTML</a></li>
          <li>
            <a href="#">CSS</a>
            <ul class="threenav">
              <li><a href="#">css1</a></li>
              <li><a href="#">css2</a></li>
              <li><a href="#">css3</a></li>
            </ul>
          </li>
          <li><a href="#">JavaScript</a></li>
        </ul>
      </li>
      <li><a href="#">螞蟻部落四</a></li>
      <li><a href="#">螞蟻部落五</a></li>
      <li><a href="#">螞蟻部落六</a></li>
    </ul>
  </div>
</body>
</html>

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