第一步:HTML页面设计
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>树形菜单</title> <link rel="stylesheet" href="../css/tree.css" /> <script src="../js/tree.js"></script> </head> <body> <!--<span class="test" style="background-image: url('../img/plus.jpg');"> <!--1.设计网页布局--> <ul id="outerul"> <li>名站导航 <ul> <li><a href="#">毕丽巴</a></li> <li><a href="#">旅游吧</a> <ul> <li>丽江</li> <li>杭州</li> <li>呼伦贝尔</li> </ul> </li> <li><a href="#">狗粑粑</a></li> <li><a href="#">驴妈妈</a></li> </ul> </li> <li>常用软件 <ul> <li>流氓软件</li> <li>网络安全</li> <li>理财软件</li> <li>天猫多多</li> </ul> </li> <li>热门游戏 <ul> <li>王者农药</li> <li>绝地求死</li> <li>大话东游</li> <li>狗熊联盟</li> </ul> </li> <li>美女娱乐 <ul> <li>赵丽英</li> <li>林枝玲</li> <li>范冰桶</li> <li>安气辣</li> </ul> </li> </ul> </body></html>
第二步:CSS样式设计
body{font-size: 12px;line-height: 20px;}#outerul{ text-align: left; margin:0px; padding: 0;cursor: pointer;}#outerurl ul lia{ text-decoration: none;color:black;}#outerul li{ margin:-2px 0 0 -20px; padding: 0; list-style: none;}#outerul .plus{ float:left; width:32px;height: 15px; background-position: 0 50%; background-repeat: no-repeat; background-size: cover; border:1px solid #FF0000;}#outerul .sub{ float: left;width:18px; height: 15px; background-position: 0 50%; background-size: cover; background-repeat: no-repeat;}/*.test{display: block;background-repeat: no-repeat;}*/
第三部:JS设计
/*树形菜单:冒泡排序*/var menu,subMenus,menuIcon;function init(){ menuArray=document.getElementById('outerul').getElementsByTagName('li'); for(var i=0;i<menuArray.length;i++){ subMenus=menuArray[i].getElementsByTagName('ul'); if(subMenus.length>0){ menuIcon=document.createElement('span'); menuIcon.className='plus'; menuIcon.style.backgroundImage='url(../img/plus.jpg)'; menuIcon.onclick=function(){ showHide(this.parentNode); } menuArray[i].insertBefore(menuIcon,menuArray[i].firstChild); subMenus[0].style.display='none'; }else{ menuIcon=document.createElement('span'); menuIcon.className='sub'; menuIcon.style.backgroundImage='url(../img/2.jpg)'; menuArray[i].insertBefore(menuIcon,menuArray[i].firstChild); }//end if }}/*隐藏方法*/function showHide(parentNode){ var ul=parentNode.getElementsByTagName('ul')[0]; ul.style.display=(ul.style.display=='none')?'block':'none'; var span=parentNode.getElementsByTagName('span')[0]; span.style.backgroundImage=(ul.style.display=='none')?'url(../img/plus.jpg':'url(../img/sub.jpg)';}window.onload=init;
效果如下:
WEB入门实践视频课:https://edu.csdn.net/course/detail/8502