var id = 0;
var xml = null;
function setid(the_id){
    id = the_id;
}

function setxml(thexml){
    xml = thexml;
}

function displaynews(id){
    setid(id);
    
    var link='feed.xml';
    var req=createRequest();
    
    req.onreadystatechange=function(){
        if(req.readyState==4 && req.status==200){
                var xmlDoc=null;
                
                try {
                    //Internet Explorer
                    xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
                    xmlDoc.loadXML(req.responseText);
                    
                } catch(e){
                
                    try{ 
                        //Firefox, Mozilla, Opera, etc.
                        parser=new DOMParser();
                        xmlDoc=parser.parseFromString(req.responseText,"text/xml");
                        
                    }catch(e){
                        alert(e.message);
                    }
                }
                setxml(xmlDoc);
                changenews(1, 1);
                display(id);
            }
        }
        req.open('GET',link,true);
        req.send(null);
    }
    
    
    function display(id) {
        var content_length = xml.getElementsByTagName("description")[id].childNodes.length;
        var content = "";
        
        for(var i =0; i < content_length; i++){
            content += xml.getElementsByTagName("description")[id].childNodes[i].nodeValue;	
        }
        
        if(id >= 0 && id <= 4){
            content += "<div class=\"decrementincrementlist\"><div id=\"news_pre\" class=\"news1_de_but\" onClick=\"news1_decrement()\"><a href=\"#\" id=\"l_b\">上一項</a></div><div class=\"news1_in_but\" onClick=\"news1_increment()\"><a href=\"#\" id=\"r_b\">下一項</a></div></div>";
        }
        
        document.getElementById("thenewscontent").innerHTML = content;
        
    }