大家都知道jQuery是一个框架,它对JS进行了封装,使其更方便使用。前面两篇博文分别是用CSS样式和JS实现的,那么这篇就用jQuery来实现二级下拉式菜单。
使用JQuery实现需要用到的知识有:
第一种方法:将jQuery库下载到电脑上,然后引用,我下载的是jquery-1.7.1.min.js这个版本。
例如:
<script type="text/javascript" src="jquery/jquery-1.7.1.min.js"></script>
第二种方法:直接引用在线服务器上的jQuery库文件,比如谷歌服务器jQuery库,百度服务器jQuery库等。
例如:引用百度服务器上的jQuery库文件
<script type="text/javascript" src="jquery/1.9.0/jquery.js"></script>
接下来看看制作的流程:
先来看看效果图:
最后我们来看看代码的情况,和前面的区别不大:
HTML代码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><htmlxmlns="http://www.w3.org/1999/xhtml"><head><metahttp-equiv="Content-Type"content="text/html; charset=gb2312" /><title>下拉菜单</title><linkrel="stylesheet"type="text/css"href="style.css" rel="external nofollow" /><!--引用百度服务器的jQuery库--><scriptsrc="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script><scripttype="text/javascript"src="script.js"></script></head> <body><divid="nav"class="nav"> <ul> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >网站首页</a></li> <liclass="navmenu"><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >课程大厅</a> <ul> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >JavaScript</a></li> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >jQuery</a></li> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Ajax</a></li> </ul> </li> <liclass="navmenu"><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >学习中心</a> <ul> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >视频学习</a></li> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >案例学习</a></li> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >交流平台</a></li> </ul> </li> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >经典案例</a></li> <li><ahref="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >关于我们</a></li> </ul></div></body></html>
CSS样式表外部style.css文件代码:
/*CSS全局设置*/*{ margin:0; padding:0;}.nav{ background-color:#EEEEEE; height:40px; width:450px; margin:0auto;}ul{ list-style:none;}ul li{ float:left; line-height:40px; text-align:center;}a{ text-decoration:none; color:#000000; display:block; width:90px; height:40px;}a:hover{ background-color:#666666; color:#FFFFFF;}ul li ul li{ float:none; background-color:#EEEEEE;}ul li ul{ display:none;}/*为了兼容IE7写的CSS样式,但是必须写在a:hover前面*/ul li ul li a:link,ul li ul li a:visited{ background-color:#EEEEEE;}ul li ul li a:hover{ background-color:#009933;}
JS脚本外部script,js文件代码:
$(function(){ $(".navmenu").mouseover(function(){ $(this).children("ul").show(); }) $(".navmenu").mouseout(function(){ $(this).children("ul").hide(); })})
以上所述是小编给大家介绍的jquery二级导航下拉菜单详解整合,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对武林网网站的支持!
新闻热点
疑难解答