ajax|导航|雅虎

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：

• 单击触发
• <A>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<A>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

<!--由于我看不懂雅虎的代码,所以使用了一些基本的代码去实现这些功能,可能效率不高,不过效果是出来了.-->

• 鼠标滑过延时触发: onmouseover时var waitInterval=window.setTimeout("func();",300);onmouseout时clearTimeout(waitInterval);
• <A>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：

源码下载：

JS文件分析：

代码拷贝框
function getObject(objectId) { if(document.getElementById && document.getElementById(objectId)) { // W3C DOM return document.getElementById(objectId); } else if (document.all && document.all(objectId)) { // MSIE 4 DOM return document.all(objectId); } else if (document.layers && document.layers[objectId]) { // NN 4 DOM.. note: this won't find nested layers return 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);document.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(document.cookie);if(oMatch&&oMatch.length>1)return unescape(oMatch[1]);else return '';}function CreateXMLHttpRequest(){ // Initialize Mozilla XMLHttpRequest object if (window.XMLHttpRequest){ xmlHttp = new XMLHttpRequest(); } // Initialize for IE/Windows ActiveX version else if (window.ActiveXObject) { try{ xmlHttp = new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch (e){ try{ xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e){newsstring = "<div class='loading'>Loading rquest content fail, Please try it again latter...</div>";} } }}function getnews(tagid,x){url = "tab/"+tagid+'_'+x+'.html';var url2=url;requestType = tagid;if(ajccache[url]==null){var loadstatustext="<div class='loading'><img src='http://www.webjx.com/htmldata/2007-01-19/tab/images/loading.gif' /> Loading request content, please wait...</div>";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 process if (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-pane shownews(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 else TabNews(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<as.length;i++){as[i].target="_self";}}function GetUrlParam(paramName){ //获取URL参数的函数 var oRegex = new RegExp('[\?&]' + paramName + '=([^&]+)', 'i'); var oMatch = oRegex.exec(window.location.search); if(oMatch && oMatch.length > 1) return oMatch[1]; else return '';}function hideText(){if(document.getElementsByTagName("arkoo:title").length==0){var upu=GetUrlParam("username");var upa=GetUrlParam("articleid");getObject("closeit").innerHTML='<a href="http://cn.arkoo.com/diaryfiles/showpage.aspx?username='+upu+'&articleid='+upa+'" target="_blank">查看原文</a> <a href="tab.html" target="_self">×</a>';}}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 else var 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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