定时自动切换的选项卡Tab_菜单导航特效

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JavaScript配合CSS制作一个能自动切换的网页选项卡,每隔一段时间,它就自动切换选项卡列表和标题,时间自设,这里要注意,用于产生changeTabInterval的随机数，防止页面上TabPane过多，如果设置的changeTabInterval都一样的话会产生整齐划一的切换的效果，不美观.

<title>自动切换Tab选项卡</title> <script type="text/javascript"> function randint(m,n)//产生m-n之间的随机整数 { return Math.random()*(n-m)+m; } function IfNull(a,dv) { return typeof(a) =="undefined"?dv:a; } var TabPaneConfig = { idPrefix: "tab-panel-object-", idCounter: 0, getId: function(){ return this.idPrefix+this.idCounter++;}, tabHeadId: "tabHead", tabHeadClass: "tab-head tab-border", tabBodyId: "tabBody", tabBodyClass: "tab-border" } function TabPane(id,changeTabInterval,isAutoChangeTab){ this.id = id; this.height = "100%"; this.width = "100%"; this.tabPages = 0; this.head = null; this.body = null; this.changeTabInterval=IfNull(changeTabInterval,10); this.isAutoChangeTab=IfNull(isAutoChangeTab,true); this.changeTabTimerId = null; } TabPane.prototype.init = function(){ var r = document.getElementById(this.id); if(!r.style.overflow) r.style.overflow = "auto"; r.className = "tab"; //create head var div = document.createElement("div"); div.id = TabPaneConfig.tabHeadId; div.className = TabPaneConfig.tabHeadClass; r.appendChild(div); this.head = div; var ul = document.createElement("ul"); div.appendChild(ul); //create body div = document.createElement("div"); div.id = TabPaneConfig.tabBodyId; div.className = TabPaneConfig.tabBodyClass; r.appendChild(div); this.body = div; if(this.isAutoChangeTab) { var tabPane = this; this.changeTabTimerId = setInterval(function(){onChangeTabTimer(tabPane);},this.changeTabInterval*1000); } } TabPane.prototype.stopChangeTabTimer = function () { if(this.isAutoChangeTab) { clearInterval(this.changeTabTimerId); } } TabPane.prototype.addTabPage = function(obj) { if(!document.getElementById(obj.panel)) return; if(!this.tabPages) this.init(); this.head.firstChild.appendChild(this.createTabTitle(obj)); this.body.appendChild(document.getElementById(obj.panel)); this.tabPages++; } TabPane.prototype.createTabTitle = function(obj){ var li = document.createElement("li"); li.id = TabPaneConfig.getId(); li.data = obj.panel; var tabPane = this; li.onclick=function(){tabOnClick(tabPane,li)}; li.style.width = obj.width; if(this.tabPages) { li.className=""; document.getElementById(obj.panel).style.display="none"; } else { li.className="hover"; document.getElementById(obj.panel).style.display="block"; } var textNode = document.createTextNode(obj.title); li.appendChild(textNode); return li; } //得到所有Tab页的Li元素 TabPane.prototype.getLiArr = function() { return this.head.firstChild.children; } TabPane.prototype.getAcitveLi = function() { var liArr = this.getLiArr(); for(var i=0; i<liArr.length; i++) { if(liArr[i].className=="hover") { return liArr[i]; } } } //切换到指定的li对应的Tab页 TabPane.prototype.changeToTab = function (li) { var liArr = this.getLiArr(); for(var i=0; i<liArr.length; i++) { liArr[i].className=""; document.getElementById(liArr[i].data).style.display="none"; } li.className="hover"; document.getElementById(li.data).style.display="block"; } //得到v在数组arr中的序号 function indexOf(arr,v) { for(var i = arr.length; i-- && arr[i] !== v;); return i; } function onChangeTabTimer(tabPane) { var liArr = tabPane.getLiArr(); var activeLi = tabPane.getAcitveLi(); var i = indexOf(liArr,activeLi); var nexti = (i+1+liArr.length)%liArr.length; var nextLi = liArr[nexti]; tabPane.changeToTab(nextLi); } function tabOnClick(tabPane,li) { tabPane.stopChangeTabTimer(); tabPane.changeToTab(li); } </script> <style> .tab { font-family: Verdana, Helvetica, Arial; font-size: 12px; position: relative; width: 100%; } .tab-border {border:1px solid;border-color: rgb(120,172,255);} .tab-head { background-color:rgb(234,242,255);; border:0px; height:23px; line-height:20px; position:relative; } .tab-head ul{ border:0px; height:23px; list-style:none; margin:0px; text-align:center; padding:0; position:absolute; } .tab-head li{ border: 1px solid; border-color: rgb(120,172,255); border-left: 0; border-bottom: 0; border-top: 0; cursor:pointer; color:#416AA3; float:left; display:block; height:22px;!important;height:20px; line-height:20px; padding: 2px 6px 0px 6px; margin-top: 2px; margin-right: -1px; text-overflow:ellipsis; white-space:nowrap; overflow:hidden; } .tab-head li.hover{ border: 1px solid rgb(120,172,255); border-bottom: 0; padding: 0px 6px 3px 6px; margin: 0px 1px 0px 0px; background: white; font-size: 13px; font-weight: bold; color: rgb(0,66,174); overflow:visible; } </style> <div id="rptopmain_right_middle_right">  <div id="divForumBoard"></div> <div id="divForumCast" style="padding:8px;height:200px"> <DIV class=rp_2equalcol><A href="#" target=_blank>黑客零起点教程 CHM</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>可以加密及解密的VB屏幕键盘组件</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>什么样的项目经历会让面试官眼前一亮</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>超级j2me飞行游戏疯狂雷电源代码</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>可以加密及解密的VB屏幕键盘组件</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>编程学习中的一些错误认识</A></DIV> </div> <div id="divForumPanel" style="padding:8px;height:210px"> <DIV class=rp_2equalcol><A href="#" target=_blank>Delphi多文档几何图形绘制及编辑程序</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>学ACM算法题有用吗？</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>黑客零起点教程 CHM</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>超级j2me飞行游戏疯狂雷电源代码</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>B实现主窗体控制副窗口的显示与隐藏</A></DIV> <DIV class=rp_2equalcol><A href="#" target=_blank>Delphi多文档几何图形绘制及编辑程序</A></DIV> </div> <script> var tp = new TabPane("divForumBoard",randint(3,10)); 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