WEB前端:02_Menu下拉菜单
时间:2014-04-30 02:53:26
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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> |
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