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javascript实现带下拉子菜单的导航菜单效果

2019-11-20 12:28:33
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本文实例讲述了javascript实现带下拉子菜单的导航菜单效果。分享给大家供大家参考。具体实现方法如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>带下拉子菜单的导航菜单</title><style type="text/css">body { font-family: Verdana; font-size: 12px; line-height: 1.5; }a { color: #000; text-decoration: none; }a:hover { color: #F00; }#menu { width:500px; height:28px; margin:0 auto; border-bottom:3px solid #E10001;}#menu ul { list-style: none; margin: 0px; padding: 0px; }#menu ul li { float:left; margin-left:2px;}#menu ul li a { display:block; width:87px; height:28px; line-height:28px; text-align:center; font-size:14px;}#menu ul li a#current { font-weight:bold; color:#fff;}#menu ul li ul { border:1px solid #ccc; display:none; position:absolute;}#menu ul li ul li { float:none; width:87px; background:#eee; margin:0;}#menu ul li ul li a { background:none;}#menu ul li ul li a:hover { background:#333; color:#fff;}#menu ul li:hover ul { display:block;}#menu ul li.sfhover ul { display:block;}</style><script type="text/javascript"><!--  //--><![CDATA[//><!--function menuFix() {  var sfEls = document.getElementById("menu").getElementsByTagName("li");  for (var i = 0; i < sfEls.length; i++) {    sfEls[i].onmouseover = function () {      this.className += (this.className.length > 0 ? " " : "") + "sfhover";    }    sfEls[i].onMouseDown = function () {      this.className += (this.className.length > 0 ? " " : "") + "sfhover";    }    sfEls[i].onMouseUp = function () {      this.className += (this.className.length > 0 ? " " : "") + "sfhover";    }    sfEls[i].onmouseout = function () {      this.className = this.className.replace(new RegExp("( ?|^)sfhover//b"),    "");    }  }}window.onload = menuFix;//--><!]]></script></head><body><div id="menu"><ul>  <li><a id="current" href="#">首页</a></li>  <li><a href="#">网页版式</a>    <ul>      <li><a href="#">自适应宽度</a></li>      <li><a href="#">固定宽度</a></li>    </ul>  </li>  <li><a href="#">web教程</a>    <ul>      <li><a href="#">新手入门</a></li>      <li><a href="#">视频教程</a></li>      <li><a href="#">常见问题</a></li>    </ul>  </li>  <li><a href="#">web实例</a></li>  <li><a href="#">常用代码</a></li></ul></div></body></html>

希望本文所述对大家的javascript程序设计有所帮助。

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