Ajax编写Rss阅读器

Ajax 编写Rss阅读器

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>this is test</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function XHConn()
{
var xmlhttp, bComplete = false;
try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }
catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
catch (e) { try { xmlhttp = new XMLHttpRequest(); }
catch (e) { xmlhttp = false; }}}
if (!xmlhttp) return null;
this.connect = function(sURL, sMethod, sVars, fnDone)
{
    if (!xmlhttp) return false;
    bComplete = false;
    sMethod = sMethod.toUpperCase();

    try {
      if (sMethod == "GET")
      {
        xmlhttp.open(sMethod, sURL+ ((sURL.indexOf("?")==-1)? "?":"&") +sVars, true);
        sVars = "";
      }
      else
      {
        xmlhttp.open(sMethod, sURL, true);
        xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
        xmlhttp.setRequestHeader("Content-Type",
          "application/x-www-form-urlencoded");
      }
      xmlhttp.onreadystatechange = function(){
        if (xmlhttp.readyState == 4 && !bComplete)
        {
          bComplete = true;
          fnDone(xmlhttp);
        }};
      xmlhttp.send(sVars);
    }
    catch(z) { return false; }
    return true;
};
return this;
}

function readRSS(url) {
var myConn = new XHConn();
if (!myConn) {alert("error");return;}
myConn.connect(url, "GET", "", ResultSet);
}

var ResultSet = function(obj)
{
    var results = obj.responseXML;
    var title = null;
    var item = null;
    var link=null;
    var author=null;
    var pubDate=null;
    var description=null;
    //得到channel
     var headtitle=results.selectSingleNode("rss/channel/title").text;
     var headlink=results.selectSingleNode("rss/channel/link").text;
     var cell = document.createElement("div");
        cell.innerHTML="<h1><a href="+headlink+" target=_blank>"+headtitle+"</a></h1><br/>";
        document.getElementById("result").appendChild(cell);
       //得到items
    var items = results.selectNodes("rss/channel/item");
    for(var i = 0; i < items.length; i++) {
        item = items[i];
        link=item.getElementsByTagName("link")[0].firstChild.nodeValue;
        title = item.getElementsByTagName("title")[0].firstChild.nodeValue;
        pubDate= item.getElementsByTagName("pubDate")[0].firstChild.nodeValue;
  author= item.getElementsByTagName("dc:creator")[0].firstChild.nodeValue;
       // description=item.getElementsByTagName("description")[0].firstChild.nodeValue;
        var cell = document.createElement("div");
        cell.innerHTML="<a href="+link+" target=_blank>"+title+"</a><font color=red>&nbsp &nbsp &nbsp作者:</font>"+author+"<br/>";


       document.getElementById("result").appendChild(cell);
       //var cell1=document.createElement("div");
       //cell1.innerHTML=description;
       // document.getElementById("result").appendChild(cell1);
    }

}
function readrss1()
{
readRSS("http://blog.csdn.net/wl076/Rss.aspx");
}
window.onload = readrss1;
</script>
</head>

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