大家都知道jQuery是一個(gè)框架,它對(duì)JS進(jìn)行了封裝,使其更方便使用。前面兩篇博文分別是用CSS樣式和JS實(shí)現(xiàn)的,那么這篇就用jQuery來實(shí)現(xiàn)二級(jí)下拉式菜單。
使用JQuery實(shí)現(xiàn)需要用到的知識(shí)有:
第一種方法:將jQuery庫(kù)下載到電腦上,然后引用,我下載的是jquery-1.7.1.min.js這個(gè)版本。
例如:
<script type="text/javascript" src="jquery/jquery-1.7.1.min.js"></script>
第二種方法:直接引用在線服務(wù)器上的jQuery庫(kù)文件,比如谷歌服務(wù)器jQuery庫(kù),百度服務(wù)器jQuery庫(kù)等。
例如:引用百度服務(wù)器上的jQuery庫(kù)文件
<script type="text/javascript" src="jquery/1.9.0/jquery.js"></script>
接下來看看制作的流程:
先來看看效果圖:
最后我們來看看代碼的情況,和前面的區(qū)別不大:
HTML代碼:
<!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=gb2312" /> <title>下拉菜單</title> <link rel="stylesheet" type="text/css" href="style.css" rel="external nofollow" /> <!--引用百度服務(wù)器的jQuery庫(kù)--> <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> <script type="text/javascript" src="script.js"></script> </head> <body> <div id="nav" class="nav"> <ul> <li><a href="#" 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" >網(wǎng)站首頁(yè)</a></li> <li class="navmenu"><a href="#" 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" >課程大廳</a> <ul> <li><a href="#" 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><a href="#" 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><a href="#" 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> <li class="navmenu"><a href="#" 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" >學(xué)習(xí)中心</a> <ul> <li><a href="#" 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" >視頻學(xué)習(xí)</a></li> <li><a href="#" 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" >案例學(xué)習(xí)</a></li> <li><a href="#" 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" >交流平臺(tái)</a></li> </ul> </li> <li><a href="#" 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" >經(jīng)典案例</a></li> <li><a href="#" 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" >關(guān)于我們</a></li> </ul> </div> </body> </html>
CSS樣式表外部style.css文件代碼:
/*CSS全局設(shè)置*/ *{ margin:0; padding:0; } .nav{ background-color:#EEEEEE; height:40px; width:450px; margin:0 auto; } 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; } /*為了兼容IE7寫的CSS樣式,但是必須寫在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腳本外部script,js文件代碼:
$(function(){ $(".navmenu").mouseover(function(){ $(this).children("ul").show(); }) $(".navmenu").mouseout(function(){ $(this).children("ul").hide(); }) })
以上所述是小編給大家介紹的jquery二級(jí)導(dǎo)航下拉菜單詳解整合,希望對(duì)大家有所幫助,如果大家有任何疑問請(qǐng)給我留言,小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)億速云網(wǎng)站的支持!
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