本文執行個體講述了JavaScript+CSS實現仿天貓側邊網頁菜單效果。分享給大家供大家參考。具體如下：
這是一款自己寫的仿天貓的菜單效果，二級分類的功能已經實現，但沒有美化，留著用的朋友自己完善吧，JS功能已經實現，滑鼠移在主分類上，二級分類向右伸出展開，目前淘寶網、天貓購物、京東都在用的導覽功能表特效，測試時候請先點擊一下菜單，主菜單就顯示出來了。
運行效果截圖如下：
線上示範地址如下：
http://demo.jb51.net/js/2015/js-css-ftamil-web-menu-style-codes/
具體代碼如下：
<!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=utf-8" /><title>仿天貓側邊網頁菜單</title><style type="text/css">*{margin:0; padding:0;}body{ font-size:14px; font-family:"宋體";}h1, h2, h3{ font-size:14px; font-weight:normal;}li{ list-style:none;}a{ color:#333; text-decoration:none;}#nav{ width:202px; height:35px; background:#C00; margin:50px 0 0 20px;}#nav h1{ padding-left:17px; line-height:35px; color:#fff; margin-right:17px;}#box{ width:200px; border:1px solid #B00; border-top:none; margin-left:20px; display:none;}#subnav{width:200px;}#subnav .list{ width:200px; height:30px;}#subnav .list h2{ width:160px; height:30px; padding-left:30px; line-height:30px; margin-right:10px;}#subnav .list a:hover, #subnav .active a:hover{ color:#900; font-weight:bold;}#subnav .active{ width:200px; height:30px; border-bottom:1px solid #b00; border-top:1px solid #b00; position:relative;}#subnav .active h2{ width:170px; height:30px; padding-left:30px; line-height:30px; background:#fff; position:absolute; left:1px; top:0; z-index:4;}#subnav .list_nav{ width:500px; overflow:hidden; border:1px solid #b00; position:absolute; left:200px; top:-1px; z-index:3; display:none;}</style><script type="text/javascript">window.onload=function(){ var oNav=document.getElementById('nav'); var oBox=document.getElementById('box'); var oSubnav=document.getElementById('subnav'); var aLi=oSubnav.getElementsByTagName('li'); var i=0; oNav.onclick=function() { if(oBox.style.display=='block') { oBox.style.display='none'; } else { oBox.style.display='block'; } } for(i=0;i<aLi.length;i++) { if(aLi[i].className=='list') { aLi[i].onmousemove=function() { for(i=0;i<aLi.length;i++) { var aDivList=this.getElementsByTagName('div')[0]; aDivList.style.display='block'; this.className='active'; } } aLi[i].onmouseout=function() { for(i=0;i<aLi.length;i++) { var aDivList=this.getElementsByTagName('div')[0]; aDivList.style.display='none'; this.className='list'; } } } }};</script></head><body><div id="nav"><h1>所有商品分類</h1></div><div id="box"> <ul id="subnav"> <li class="list"> <h2><a href="#">服飾內衣、鞋靴運動</a></h2> <div class="list_nav"> <ul> <li>1</li> <li>1</li> <li>1</li> <li>1</li> </ul> </div> </li> <li class="list"> <h2><a href="#">電子商品</a></h2> <div class="list_nav"> <ul> <li>222</li> <li>2222</li> <li>2222</li> <li>22222</li> </ul> </div> </li> <li class="list"> <h2><a href="#">服飾內衣、鞋靴運動</a></h2> <div class="list_nav"> <ul> <li>3333</li> <li>3333</li> <li>3333</li> <li>3333</li> </ul> </div> </li> <li class="list"> <h2><a href="#">服飾內衣、鞋靴運動</a></h2> <div class="list_nav"> <ul> <li>1</li> <li>1</li> <li>1</li> <li>1</li> </ul> </div> </li> </ul></div></body></html>
希望本文所述對大家的javascript程式設計有所協助。
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