本文實例講述了JS實現靈巧的下拉導航效果代碼。分享給大家供大家參考。具體如下：
這是一款基于JS實現下拉菜單，是一款靈巧的網站導航條，支持二級顯示，向下滑動顯示，經典的下拉菜單，JS和CSS共同編寫實現，Li菜單列表風格，便于修改，兼容各大主流瀏覽器，相信你也會喜歡的。
運行效果截圖如下：
在線演示地址如下：
http://demo.VeVB.COm/js/2015/js-down-nav-blue-menu-style-codes/
具體代碼如下：
<!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>js暗藍色下拉導航菜單</title><style>@charset "utf-8";body{padding:0px;margin:0px;}body{font-family:Arial, Helvetica, sans-serif;font-size:9pt;background-color:#3A4954;}ul,li{padding:0px;margin:0px;list-style-type: none;}* a{text-decoration: none;color:#CFE0EE;}a:hover{color:#F09C42;}a:hover{color:#F09C42;}#navMenu{width:100%;height: 34px;line-height: 34px;display:block;overflow:hidden;background-image: url(images/nav_bg.jpg);background-repeat:repeat-x;background-position: left top;}#navMenu ul{width:95%;margin-left:16px;}#navMenu .onelink{background-image:none;}#navMenu li{width:90px;text-align:center;float: left;line-height: 34px;height: 34px;background-image: url(images/nav_fg.jpg);background-repeat: no-repeat;background-position: 0 center;margin-left: -2px;}#navMenu li a{color:#6CA7C7;font-family: "宋體";padding-right: 1em;padding-left: 1em;margin-left: 2px;display: block;}#navMenu li a:hover, #navMenu li.hover a{background-image: url(images/hover_bg.jpg);background-repeat:repeat-x;background-position: center top;text-decoration: none;color:#FF7B0E;}.dropMenu{position:absolute;top: 0;z-index:100;width: 110px;visibility: hidden;margin-top: -1px;margin-left:-2px;border: 1px solid #4D5B66;border-top: 0px solid #3CA2DC;background-color: #0D1C31;padding-top:6px;padding-bottom:6px;filter: Alpha(Opacity=85);}.dropMenu li{margin-top:2px;margin-bottom:4px;padding-left:6px;}.dropMenu li a{width: 92%;display: block;text-align:center;color: black;padding: 4px 0 4px 0px;color:#6CA7C7;border-bottom: 1px dashed #4D5B66;}.dropMenu+li a{border-top:none;}* html .dropMenu a{width: 100%;color:#6CA7C7;}.dropMenu a:hover{text-decoration: underline;color:#F09C42;}.hdo{width:100%;height:auto;display:block;overflow:hidden;}</style><script type='text/javascript' src='js/dropdown.js'></script></head><body><div id="navMenu"><ul> <li class="onelink"><a href='#' target="_blank">主頁</a></li> <li><a href='#' target="_blank">HTML+CSS模板</a></li> <li><a href='#' rel='dropmenu1' target="_blank">JS代碼</a></li> <li><a href='#' rel='dropmenu2' target="_blank">電子商務</a></li> <li><a href='#' >SEO優化</a></li> <li><a href='#' rel='dropmenu3' target="_blank">建站技巧</a></li> <li><a href='#' target="_blank">網絡營銷</a></li> </ul></div><ul id="dropmenu1" class="dropMenu"> <li><a href="#" target="_blank">導航菜單</a></li> <li><a href="#" target="_blank">焦點幻燈片</a></li> <li><a href="#" target="_blank">網頁特效</a></li> <li><a href="#" target="_blank">廣告代碼</a></li></ul><ul id="dropmenu2" class="dropMenu"> <li><a href="#" target="_blank">企業類網站</a></li> <li><a href="#" target="_blank">行業類網站</a></li> <li><a href="#/" target="_blank">BLOG類網站</a></li> <li><a href="#" target="_blank">門戶類網站</a></li> <li><a href="#" target="_blank">商城類網站</a></li></ul><ul id="dropmenu3" class="dropMenu"> <li><a href="#" target="_blank">HTML技巧</a></li> <li><a href="#" target="_blank">CSS技巧</a></li> <li><a href="#" target="_blank">CMS建站技巧</a></li> <li><a href="#" target="_blank">其他技巧</a></li></ul><script type="text/javascript">cssdropdown.startchrome("navMenu")</script> <!--//nav--></body></html>希望本文所述對大家的javascript程序設計有所幫助。
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