用ajax标签实现雅虎导航效果实现

经过多次改进，可以在普通网站上直接使用了，现在发布源程序下载（编码为utf-8，改为gb3212的方法是：用记事本打开，另存时选择相应的编码），希望对大家有用（虽然不一定实用）。
因为只是标签导航,所有内容还会在频道页中体现,所在全部用AJAX读取。

功能的实现思路：

雅虎中国

• 单击触发
• 块锁定:a{display:block;height:16px;}/*将A锁定为块级,再定义高度和宽度*/
• 再次单击弹出链接:在标记的onclick事件中需要执行读取时,return false;否则return true;
• AJAX读取数据
• 数据暂存
• 窗口平滑收缩

网易

• 鼠标滑过延时触发: onmouseover时var waitInterval=window.setTimeout("func();",300);onmouseout时clearTimeout(waitInterval);
• 块锁定、AJAX读取数据、数据暂存、窗口平滑收缩

其它功能：

• cookie记忆
• 最后读取数据的服务器时间
• 滑动门技术

在线效果：
www.jzxue.com/Files/UpLoadfiles/2007/2/tabdomo/tab.html

源码下载：点击这里下载源文件

JS文件分析：

代码拷贝框
function getObject(objectId) {if(document.getElementById && document.getElementById(objectId)) {// W3C DOMreturn document.getElementById(objectId);}else if (document.all && document.all(objectId)) {// MSIE 4 DOMreturn document.all(objectId);}else if (document.layers && document.layers[objectId]) {// NN 4 DOM.. note: this won't find nested layersreturn document.layers[objectId];}else {return false;}}var responsecont;var xmlHttp;var xH=new Object();var rqtp=new Object();var dateStr,dStr;var requestType;var etype=0;var newsstring;var ajccache=new Object();var url;var MouseDelayTime=200;//鼠标感应延迟var waitInterval;var Browser = new Object();Browser.isMozilla = (typeof document.implementation != 'undefined') && (typeof document.implementation.createDocument != 'undefined') && (typeof HTMLDocument!='undefined');Browser.isIE = window.ActiveXObject ? true : false;Browser.isFirefox = (navigator.userAgent.toLowerCase().indexOf("firefox")!=-1);Browser.isOpera = (navigator.userAgent.toLowerCase().indexOf("opera")!=-1);function SetCookie(name,value,expires){//写cookievar exp=new Date();exp.setTime(exp.getTime() expires*60000);documents.cookie=name "=" escape(value) ";expires=" exp.toGMTString();// ";domain=arkoo.com;path=/";}function readcookie(name){//读取cookievar oRegex=new RegExp(name '=([^;] )','i');var oMatch=oRegex.exec(documents.cookie);if(oMatch&&oMatch.length>1)return unescape(oMatch[1]);else return '';}function CreateXMLHttpRequest(){// Initialize Mozilla XMLHttpRequest objectif (window.XMLHttpRequest){xmlHttp = new XMLHttpRequest();}// Initialize for IE/Windows ActiveX versionelse if (window.ActiveXObject) {try{xmlHttp = new ActiveXObject("Msxml2.XMLHTTP.3.0");}catch (e){try{xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");}catch (e){newsstring = "Loading rquest content fail, Please try it again latter...";}}}}function getnews(tagid,x){url = "tab/" tagid '_' x '.html';var url2=url;requestType = tagid;if(ajccache[url]==null){var loadstatustext="<img src='http://p1.mb5u.com/ggad/200882219255693777801.gif' / style="cursor: pointer" alt="点此在新窗口浏览图片" onclick="javascript:window.open(this.src);" onmousewheel="return bbimg(this)" onload="javascript:resizepic(this)" border="0"/> Loading request content, please wait...";rqtp[tagid]=tagid;CreateXMLHttpRequest();var hdr=tagid;xH[tagid]=xmlHttp;if(etype==1)getObject(requestType '_cnt').innerHTML = loadstatustext;xH[tagid].onreadystatechange = function(){// only if xmlHttp shows "complete"if (xH[tagid].readyState == 4){// only http 200 to processif (window.location.href.indexOf("http")==-1 || xH[tagid].status == 200){newsstring = xH[tagid].responseText;dateStr=xH[tagid].getResponseHeader("Date");dStr = new Date(dateStr);SetCookie('dStr',dStr,10000000);//inject centent to tab-paneshownews(rqtp[tagid],newsstring);ajccache[url2]=newsstring;}}}xH[tagid].open("GET", url, true);xH[tagid].setRequestHeader("If-Modified-Since","0");xH[tagid].send(null);}else{shownews(requestType,ajccache[url]);}}function shownews(requestType,newsstring){//<![CDATA[responsecont = getObject(requestType '_cnt');responsecont.innerHTML = newsstring;getObject("pdate").innerHTML=dStr;if(getObject("alta")){ata(getObject("alta"));hideText();}//]]>}function TabNews(tagid,x){var lim=getObject(tagid "_mn").getElementsByTagName('li');var mnt=getObject(tagid "_mn").getElementsByTagName('li').length;if(!mnt)mnt=4;for(var i=0;i<mnt;i ){if(i == (x-1)){if(i==0){lim[i].className="tabactive1";}else{lim[i].className="tabactive2";lim[i-1].getElementsByTagName('a')[0].style.background="url()";}lim[i].getElementsByTagName('a')[0].style.background="url(tab/images/tab_bgs.gif) right -60px no-repeat";try{getnews(tagid,x);}catch(e){alert(e);}}else{lim[i].className="";lim[i].getElementsByTagName('a')[0].style.background="url(tab/images/tab_bgs.gif) right -88px no-repeat";}}}var idn,tmpa,tmpat;var aw="";var rT;function aet(tagid,etp){var lis=getObject(tagid "_mn").getElementsByTagName('li');var wts=tagid "_cnt";var wnf=tagid "info";if(readcookie(tagid "_cntd")=="none"){hiddenList(getObject(wts));maxh[wts]=readcookie(tagid "_cnth");getObject("pdate").innerText=readcookie("dStr");}else{if(parseInt(readcookie(wnf))>1)TabNews(tagid,readcookie(wnf));//返回上次访问elseTabNews(tagid,1);if(etp==1)aw=tagid readcookie(wnf);}for(var iy=0;iy<lis.length;iy ){with(lis[iy]){if(etp==0){lis[iy].onmouseover=function(){rT=attributes.getNamedItem('id').value.substring(0, attributes.getNamedItem('id').value.length-1);if(getObject(rT '_cnt').style.display != "none"&&className!="") return;idn=parseInt(attributes.getNamedItem('id').value.substring(attributes.getNamedItem('id').value.length-1, attributes.getNamedItem('id').value.length));clearTimeout(waitInterval);waitInterval=window.setTimeout("etype=0;TabNews(rT,idn);if(getObject(rT '_cnt').style.display == 'none')displayList(rT '_cnt'); SetCookie(rT 'info',idn,10000000);SetCookie(rT '_cntd','ture',10000000);",MouseDelayTime);}lis[iy].onmouseout=function(){if(getObject(rT '_cnt').style.display != "none"&&className!="") return;clearTimeout(waitInterval);}}if(etp==1){lis[iy].onmouseover=function(){getElementsByTagName('a')[0].blur();}lis[iy].onclick=function(){idn=parseInt(attributes.getNamedItem('id').value.substring(attributes.getNamedItem('id').value.length-1, attributes.getNamedItem('id').value.length));rT=attributes.getNamedItem('id').value.substring(0, attributes.getNamedItem('id').value.length-1);if(getObject(rT '_cnt').style.display != "none"&&(idn==1&&(this.className=="tabactive1")||aw==attributes.getNamedItem('id').value)) return true;if(getObject(rT '_cnt').style.display == "none"){displayList(rT '_cnt');SetCookie(rT '_cntd','ture',10000000);}etype=1;TabNews(rT,idn);SetCookie(rT 'info',idn,10000000);aw=attributes.getNamedItem('id').value;getElementsByTagName('a')[0].blur();return false;}}}}}function ata(objid){var as=objid.getElementsByTagName('a');for(var i=0;i 1)return oMatch[1];elsereturn '';}function hideText(){if(document.getElementsByTagName("arkoo:title").length==0){var upu=GetUrlParam("username");var upa=GetUrlParam("articleid");getObject("closeit").innerHTML='查看原文 ×';}}var maxh=new Object();//显示内容框function displayList(oid){var h = 0;var objid=getObject(oid);if(isNaN(parseInt(maxh[oid]))) var max_h = 210; // 容器的最大高度elsevar max_h = maxh[oid];var anim = function(){h = 50; // 每次递增50像素if(h >= max_h){objid.style.height = max_h "px";;getObject('tab' objid.attributes.getNamedItem('id').value).style.background="url(tab/images/tab_bgs.gif) 5px -113px no-repeat"; // 让图片标签改变背景if(tt){window.clearInterval(tt);}}else{objid.style.display="block";objid.style.height = h "px";}}var tt = window.setInterval(anim,2);}// 隐藏列表框function hiddenList(objid){var h = objid.offsetHeight;var anim = function(){h -= 50; // 每次递减50像素if(h <= 5){objid.style.display="none";getObject('tab' objid.attributes.getNamedItem('id').value).style.background="url(tab/images/tab_bgs.gif) -14px -114px no-repeat";if(tt){window.clearInterval(tt);}}else{objid.style.height = h "px";}}var tt = window.setInterval(anim,2);}function showClassList(oid){var objid=getObject(oid);if(objid.style.display == "none"){if(objid.getElementsByTagName("img").length==0)TabNews(oid.substring(0,oid.indexOf("_")),1);displayList(oid); // 显示内容框SetCookie(oid 'd',"ture",10000000);}else{if(isNaN(parseInt(maxh[oid]))){if(Browser.isFirefox){maxh[oid]=objid.offsetHeight;}else{maxh[oid]=objid.offsetHeight; // 内容容器的初始高度}}hiddenList(objid); // 隐藏内容框SetCookie(oid 'd',"none",10000000);SetCookie(oid 'h',maxh[oid],10000000);}}
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