AJAX初级应用-RSS无刷新聚合器的代码与下载第1/3页

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        case "clear": 
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function listen(a){ 
    getId("prolist").className=a; 
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function btnSty(objId,objStyle) 
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} 
//提示窗口控制 
function ifodis(){ 
    btnSty("loadifo","none"); 
} 
function settime(a){ 
    setTimeout(a,1000); 
} 
function loadtime(){ 
    getId("loadifo").innerHTML += "." 
} 
//数据入口 
function ent(urlName){ 
    window.location.hash = urlName 
    var frmUrl = saveState(urlName);//写入信息到ifream 
    var gamestart = loadrss(urlName);//AJAX数据过程 
} 
//XML数据绑定 
var xmldoc = false; 
function loadrss(urlName){ 
    var myurl = urlArrary(urlName) 
    if(myurl){ 
        listen("mainbg2"); 
    //生成随机数，同时限制刷新次数 
        var Num=Math.floor(Math.random()*100); 
    //定义往址参数 
        url = myurl+"?id="+Num; 
    //定义为异步传输模式 
        xmldoc = false; 
    //Mozill,Safari等浏览器时需要创建的XMLHttp类 
        if(window.XMLHttpRequest){ 
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                    xmldoc.overrideMimeType('text/xml'); 
            } 
        } 
    //IE浏览器时创建的XMLHttp类 
        else if(window.ActiveXObject){ 
            try{ 
                xmldoc = new ActiveXObject("Msxml3.XMLHTTP"); 
            } 
            catch(e){ 
                try{ 
                    xmldoc = new ActiveXObject("Msxml2.XMLHTTP"); 
                } 
                catch(e){ 
                    try{ 
                        xmldoc = new ActiveXObject("Microsoft.XMLHTTP"); 
                    } 
                    catch(e){} 
                } 
            } 
        } 
    //不能创建XMLHTTP类时返回 
        if(! xmldoc){ 
            return false; 
        } 
    //调用CheckState函数 
        xmldoc.onreadystatechange = CheckState; 
        xmldoc.open('GET',url,true); 
        xmldoc.send(null); 
    }else{ 
        getId("listnum").innerHTML = "您输入的地址错误，请重试！" 
    } 
} 
//状态检测 
function CheckState(){ 
    var response = xmldoc.responseXML.documentElement; 
    btnSty("loadifo","block") 
//收到完整的服务器响应 
    if(xmldoc.readyState == 1){ 
        getId("loadifo").innerHTML = "连接服务器" 
        } 
    else if(xmldoc.readyState == 2){ 
        getId("loadifo").innerHTML = "开始加载数据" 
        } 
    else if(xmldoc.readyState == 3){ 
        getId("loadifo").innerHTML = "正在加载数据" 
        settime(loadtime) 
        } 
    else if(xmldoc.readyState == 4){ 
//HTTP服务器响应值成功 
        if(xmldoc.status == 200){ 
//将服务器返回的字符串写到页面中ID为showdiv的区域 
     getId("loadifo").innerHTML = "加载完成" 
         settime(ifodis) 
         num(response) 
        } 
        else{ 
            getId("loadifo").innerHTML = "错误"+xmldoc.status+"点这里刷新"; 
        } 
    } 
} 
//检查数据合法性 
function trydata(nodeName,nodeName2){ 
    try{ 
        var nodeV = nodeName.firstChild.nodeValue; 
    }catch(e){ 
        try{ 
            var nodeV = nodeName2.firstChild.nodeValue; 
        }catch(e){ 
            var nodeV = "没有可用信息" 
        } 
    } 
    return nodeV; 
} 
//记录集总数 
function num(b){ 
    try{ 
        var titleNode = b.selectNodes("//rss/channel/title"); 
        var a = b.getElementsByTagName("item").length 
        titleV = trydata(titleNode(0)); 
        getId("listnum").innerHTML = "共有"+a+"篇文章　来源于："+titleV; 
        setlist(a,b); 
    }catch(e){} 
} 
if (top.location != self.location)top.location=self.location;  
//节目列表显示 
//定义接收指向各个元素的节点信息的变量 
var titleNode,linkNode,categoryNameNode,authorNode,pubDateNode,descriptionNode 
//定义接收元素值的变量 
var titleV,linkV,categoryNameV,authorV,pubDateV,descriptionV 
//分类聚合 
function setlist(a,b) 
{ 
    var prograNode = b.getElementsByTagName("item"); 
    var adminlinkNode = b.selectNodes("//rss/channel/link"); 
    var titleNode = b.selectNodes("//rss/channel/item/title"); 
    var linkNode = b.selectNodes("//rss/channel/item/link"); 
    var categoryNode = b.selectNodes("//rss/channel/item/category"); 
    var authorNode = b.selectNodes("//rss/channel/item/author"); 
    var pubDateNode = b.selectNodes("//rss/channel/item/pubDate"); 
    var descriptionNode = b.selectNodes("//rss/channel/item/description"); 
    var category2sNode = b.selectNodes("//rss/channel/item/dc:subject"); 
    var author2sNode = b.selectNodes("//rss/channel/item/dc:creator"); 
    var pubDate2sNode = b.selectNodes("//rss/channel/item/dc:date"); 
    var listchar="" 
//使用for循环，产生列表信息 
    for (i=0; i<a; i++) 
    { 
        titleV = trydata(titleNode(i)) 
        linkV = trydata(linkNode(i)) 
        categoryV = trydata(categoryNode(i),category2sNode(i)) 
        authorV = trydata(authorNode(i),author2sNode(i)) 
        pubDateV = trydata(pubDateNode(i),pubDate2sNode(i)) 
        descriptionV = trydata(descriptionNode(i)) 
        adminlinkV = trydata(adminlinkNode(0)) 
        //将得到的元素值装载到产生表格的字符串中 
        listchar += "<h5><a href='"+linkV+"' target='_blank'>"+titleV+"</a></h5><span>发表时间："+pubDateV+"</span><div class='article'>"+descriptionV+"</div><div class='bottom'>文章分类："+categoryV+"　<a href='"+adminlinkV+"' target='_blank'>作者："+authorV+"</a></div>"; 
    } 
    //将生成的表格输出到页面的DIV元素 
    getId("prolist").innerHTML = listchar; 
    listen("mainbg") 
} 
//浏览器回退部分 
//重写IFREAM链接，浏览器回退重点 
function saveState(message) { 
    var hisFrm = getId("historyFrame") 
    hisFrm.src = "blank.html?"+message 
} 
//检测IFREAM 
window.dhtmlHistory = { 
    iframeLoaded:function(newLocation){ 
        var hash = new String(newLocation.search) 
        if (hash.length >= 2 && hash.charAt(0) == "?" && hash.substring(1) !=delChar()){ 
            hash = hash.substring(1) 
            window.location.hash = hash; 
            var hisFrmdata = loadrss(hash) 
        } 
    } 
} 
//浏览器链接指向部分 
//去除符号,请注明http://www.cnrui.cn/blog转载 
function delChar(){ 
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    return     a.substring(1) 
} 
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        ent(delChar()) 
    } 
} 
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