用ajax标签实现雅虎导航效果实现_AJAX教程

推荐：Ajax开发十个常犯的错误
以下为引用的内容： 检查你AJAX requests的安全性！你简单的打开了你的数据访问层吗？充分运用FormsAuthentication和PrincipalPermissions。是不

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 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cookie var 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cookie var 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 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 = "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 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 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='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 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); } }
[Ctrl A 全部选择 然后拷贝]

分享：70个AJAX应用的演示　附源码下载
以下为引用的内容： ７０多个源码，大家可以下载下来慢慢分析，看下人家的ajax是怎样写的。 Ajallerix : AJAX,