标签：des com http blog style class div img code java size
menu下拉菜单
网站常用效果之一以下为简化版，用于学习javascript基础知识。
效果图：
menu下拉菜单 - 纯JS简化版
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<html><head><meta http-equiv="Content-Type"
content="text/html; charset=utf-8"><title>menu下拉菜单 - 纯JS简化版</title><style type="text/css">*{margin: 0; padding: 0;}#nav{height:42px;position:relative;margin-bottom:15px;z-index:9; background:#666;margin: 0 auto; list-style: none;}#nav a,#nav a:link{color:#ffffff;display:block;width:142px; font-size: 12px; text-decoration: none;}#nav a:hover{background:#cc0000; color:#FFFFFF;}#nav ul li{float:left;width:143px;text-align:center;line-height:42px;position:relative;height:42px; background:url(images/line.png) center right no-repeat;list-style: none;}#nav ul li ul{position:absolute;top:42px;left:0px;display:none;z-index:9;background:#333;border-top:none;border-radius:0 0 4px 4px;box-shadow:3px 3px 6px 1px #efefef;}#nav ul li ul li{line-height:42px;height:42px; background:none; border-bottom:1px solid #999;}#nav ul li ul a:hover,#nav ul li.pcls{background:#cc0000;color:#FFFFFF;}#nav ul li ul li ul{top:0px;left:142px;}#nav ul .navon, #nav ul li ul .navon {background: #f00;}</style><script type="text/javascript">window.onload = function() { var
nav = document.getElementById(‘nav‘); var
navli = nav.getElementsByTagName(‘li‘); for(var
i=0; i<navli.length; i++) { navli[i].onmouseover = function() { if(this.parentNode.parentNode.id != "nav") { this.parentNode.parentNode.className = "navon"; } for(var
subul=this.childNodes, f=0; f<subul.length; f++) { if(subul[f].tagName==‘UL‘) { subul[f].style.display = "block"; } } }; navli[i].onmouseout = function() { if(this.parentNode.parentNode.id != "nav") { this.parentNode.parentNode.className = ""; } for(var
subul=this.childNodes, f=0; f<subul.length; f++) { if(subul[f].tagName=="UL") { subul[f].style.display = "none"; } } }; }}</script></head><body><div id="nav"><ul> <li><a href="#">网站首页</a></li> <li><a href="#">公司简介</a> <ul> <li><a href="#">企业文化</a> <ul> <li><a href="#">文化一</a></li> <li><a href="#">文化二</a></li> <li><a href="#">文化三</a></li> <li><a href="#">文化四</a></li> </ul> </li> <li><a href="#">组织结构</a></li> <li><a href="#">公司活动</a></li> <li><a href="#">荣誉资质</a></li> </ul> </li> <li><a href="#">公司新闻</a></li> <li><a href="#">产品展示</a></li> <li><a href="#">客户留言</a></li> <li><a href="#">联系我们</a></li></ul></div></body></html> |
menu下拉菜单 - 面向对象版
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<html><head><meta http-equiv="Content-Type"
content="text/html; charset=utf-8"><title>menu下拉菜单 - 面向对象版</title><style type="text/css">*{margin: 0; padding: 0;}#nav{height:42px;position:relative;margin-bottom:15px;z-index:9; background:#666;margin: 0 auto; list-style: none;}#nav a,#nav a:link{color:#ffffff;display:block;width:142px; font-size: 12px; text-decoration: none;}#nav a:hover{background:#cc0000; color:#FFFFFF;}#nav ul li{float:left;width:143px;text-align:center;line-height:42px;position:relative;height:42px; background:url(images/line.png) center right no-repeat;list-style: none;}#nav ul li ul{position:absolute;top:42px;left:0px;display:none;z-index:9;background:#333;border-top:none;border-radius:0 0 4px 4px;box-shadow:3px 3px 6px 1px #efefef;}#nav ul li ul li{line-height:42px;height:42px; background:none; border-bottom:1px solid #999;}#nav ul li ul a:hover,#nav ul li.pcls{background:#cc0000;color:#FFFFFF;}#nav ul li ul li ul{top:0px;left:142px;}#nav ul .navon, #nav ul li ul .navon {background: #f00;}</style><script type="text/javascript">function
menu(menuid) { var
_this = this; var
menu = document.getElementById(menuid); this.menuli = menu.getElementsByTagName(‘li‘); for(var
i=0; i<this.menuli.length; i++) { this.menuli[i].onmouseover = function() { _this.hoverfn(this, menuid, "navon", "block"); }; this.menuli[i].onmouseout = function() { _this.hoverfn(this, menuid, "", "none"); }; };}menu.prototype.hoverfn = function(obj, menuid, onclass, display) { if(obj.parentNode.parentNode.id != menuid) { obj.parentNode.parentNode.className = onclass; } for(var
subul=obj.childNodes, f=0; f<subul.length; f++) { if(subul[f].tagName=="UL") { subul[f].style.display = display; } }}window.onload = function() { new
menu(‘nav‘);}</script></head><body><div id="nav"><ul> <li><a href="#">网站首页</a></li> <li><a href="#">公司简介</a> <ul> <li><a href="#">企业文化</a> <ul> <li><a href="#">文化一</a></li> <li><a href="#">文化二</a></li> <li><a href="#">文化三</a></li> <li><a href="#">文化四</a></li> </ul> </li> <li><a href="#">组织结构</a></li> <li><a href="#">公司活动</a></li> <li><a href="#">荣誉资质</a></li> </ul> </li> <li><a href="#">公司新闻</a></li> <li><a href="#">产品展示</a></li> <li><a href="#">客户留言</a></li> <li><a href="#">联系我们</a></li></ul></div></body></html> |
WEB前端：02_Menu下拉菜单,码迷,mamicode.com
标签：des com http blog style class div img code java size
原文地址：http://www.cnblogs.com/haicheng/p/3695865.html
