/*if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.open("GET","xml/news.xml",false);
xmlhttp.send();
xmlDoc=xmlhttp.responseXML;
for (i = 0; i < xmlDoc.getElementsByTagName("item").length; i++)
{
    alert(xmlDoc.getElementsByTagName("item")[i].childNodes[i].nodeValue);
}
document.getElementById("to").innerHTML=xmlDoc.getElementsByTagName("to")[0].childNodes[0].nodeValue;
document.getElementById("from").innerHTML= xmlDoc.getElementsByTagName("from")[0].childNodes[0].nodeValue;
document.getElementById("message").innerHTML= xmlDoc.getElementsByTagName("body")[0].childNodes[0].nodeValue;
*/
var showReadMore = true;

function songoftheweek() {
    if (window.ActiveXObject) //IE
        xmr = new ActiveXObject("Microsoft.XMLHTTP");
    else if (window.XMLHttpRequest) //other
        xmr = new XMLHttpRequest();
    else
        alert("your browser does not support AJAX");
    /*B*/
    xmr.open("GET", "xml/weeklysong.php", true);
    
    /*C*/
    xmr.setRequestHeader("Cache-Control", "no-cache");
    xmr.setRequestHeader("Pragma", "no-cache");

    /*D*/
    xmr.onreadystatechange = function() {
        if (xmr.readyState == 4) {
            if (xmr.status == 200) {
                /*F*/
                if (xmr.responseText != null)
                    document.getElementById("songofweek").innerHTML = xmr.responseText;
                else {
                    alert("Failed to receive PHP file from the server - file not found.");
                    return false;
                }
            }
            else
                alert("Error code " + xmr.status + " received: " + xmr.statusText);
        }
    }
    
    /*E*/
    xmr.send(null);
}

function processRSS(rssxml) {
    RSS = new RSS2Channel(rssxml);
    showRSS(RSS);
}

/*function getRSS(showreadmore) {
    
    getRSS();
}*/

function getRSS(showreadmore) {
    showReadMore = showreadmore == null ? true : showreadmore;
    /*A*/
    if (window.ActiveXObject) //IE
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
    else if (window.XMLHttpRequest) //other
        xhr = new XMLHttpRequest();
    else
        alert("your browser does not support AJAX");

    /*B*/
    xhr.open("GET", "xml/News_Reader.php", true);
    
    /*C*/
    xhr.setRequestHeader("Cache-Control", "no-cache");
    xhr.setRequestHeader("Pragma", "no-cache");

    /*D*/
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4) {
            if (xhr.status == 200) {
                /*F*/
                if (xhr.responseText != null)
                    processRSS(xhr.responseXML);
                else {
                    alert("Failed to receive RSS file from the server - file not found.");
                    return false;
                }
            }
            else
                alert("Error code " + xhr.status + " received: " + xhr.statusText);
        }
    }
    
    /*E*/
    xhr.send(null);
}

function RSS2Channel(rssxml) {
    /*A*/
    /*required string properties*/
    this.title;
    this.link;
    this.description;

    /*optional string properties*/
    this.language;
    this.copyright;
    this.managingEditor;
    this.webMaster;
    this.pubDate;
    this.lastBuildDate;
    this.generator;
    this.docs;
    this.ttl;
    this.rating;

    /*optional object properties*/
    this.category;
    this.image;

    /*array of RSS2Item objects*/
    this.items = new Array();
    
    /*B*/
    var chanElement = rssxml.getElementsByTagName("channel")[0];
    var itemElements = rssxml.getElementsByTagName("item");
    
    /*C*/
    for (var i = 0; i < itemElements.length; i++) {
        Item = new RSS2Item(itemElements[i]);
        this.items.push(Item);
    }
    
    /*D*/
    var properties = new Array("title", "link", "description", "language", "copyright", "managingEditor", "webMaster", "pubDate", "lastBuildDate", "generator", "docs", "ttl", "rating");
    var tmpElement = null;
    for (var i = 0; i < properties.length; i++) {
        tmpElement = chanElement.getElementsByTagName(properties[i])[0];
        if (tmpElement != null)
            eval("this." + properties[i] + "=tmpElement.childNodes[0].nodeValue");
    }

    /*E*/
    this.category = new RSS2Category(chanElement.getElementsByTagName("category")[0]);
    this.image = new RSS2Image(chanElement.getElementsByTagName("image")[0]);
}

function RSS2Category(catElement) {
    if (catElement == null) {
        this.domain = null;
        this.value = null;
    } else {
        this.domain = catElement.getAttribute("domain");
        this.value = catElement.childNodes[0].nodeValue;
    }
}

function RSS2Image(imgElement) {
    if (imgElement == null) {
        this.url = null;
        this.link = null;
        this.width = null;
        this.height = null;
        this.description = null;
    } else {
        imgAttribs = new Array("url", "title", "link", "width", "height", "description");
        for (var i = 0; i < imgAttribs.length; i++)
            if (imgElement.getAttribute(imgAttribs[i]) != null)
            eval("this." + imgAttribs[i] + "=imgElement.getAttribute(" + imgAttribs[i] + ")");
    }
}

function RSS2Item(itemxml) {
    /*A*/
    /*required properties (strings)*/
    this.title;
    this.link;
    this.description;

    /*optional properties (strings)*/
    this.author;
    this.comments;
    this.pubDate;

    /*optional properties (objects)*/
    this.category;
    this.enclosure;
    this.guid;
    this.source;

    /*B*/
    var properties = new Array("title", "link", "description", "author", "comments", "pubDate");
    var tmpElement = null;
    for (var i = 0; i < properties.length; i++) {
        tmpElement = itemxml.getElementsByTagName(properties[i])[0];
        if (tmpElement != null)
            eval("this." + properties[i] + "=tmpElement.childNodes[0].nodeValue");
    }

    /*C*/
    this.category = new RSS2Category(itemxml.getElementsByTagName("category")[0]);
    this.enclosure = new RSS2Enclosure(itemxml.getElementsByTagName("enclosure")[0]);
    this.guid = new RSS2Guid(itemxml.getElementsByTagName("guid")[0]);
    this.source = new RSS2Source(itemxml.getElementsByTagName("source")[0]);
}

function RSS2Enclosure(encElement) {
    if (encElement == null) {
        this.url = null;
        this.length = null;
        this.type = null;
    } else {
        this.url = encElement.getAttribute("url");
        this.length = encElement.getAttribute("length");
        this.type = encElement.getAttribute("type");
    }
}

function RSS2Guid(guidElement) {
    if (guidElement == null) {
        this.isPermaLink = null;
        this.value = null;
    } else {
        this.isPermaLink = guidElement.getAttribute("isPermaLink");
        this.value = guidElement.childNodes[0].nodeValue;
    }
}

function RSS2Source(souElement) {
    if (souElement == null) {
        this.url = null;
        this.value = null;
    } else {
        this.url = souElement.getAttribute("url");
        this.value = souElement.childNodes[0].nodeValue;
    }
}

function showRSS(RSS) {
    /*A*/
    var imageTag = "<img id='chan_image'";
    var startItemTag = "<div id='item'>";
    var startDateTag = "<div class='smalldate'>";
    var startTitle = "<div id='item_title'>";
    var startLink = "<div id='item_link'>";
    var startDescription = "<div id='item_description'>";
    var endTag = "</div>";

    /*B*/
    var properties = new Array("title", "link", "description", "pubDate", "copyright");
    for (var i = 0; i < properties.length; i++) {
        eval("document.getElementById('chan_" + properties[i] + "').innerHTML = ''"); /*B1*/
        curProp = eval("RSS." + properties[i]);
        if (curProp != null)
            eval("document.getElementById('chan_" + properties[i] + "').innerHTML = curProp"); /*B2*/
    }
    
    /*C*/
    /*show the image*/
    document.getElementById("chan_image_link").innerHTML = "";
    if (RSS.image.src != null) {
        document.getElementById("chan_image_link").href = RSS.image.link; /*C1*/
        document.getElementById("chan_image_link").innerHTML = imageTag
            + " alt='" + RSS.image.description
            + "' width='" + RSS.image.width
            + "' height='" + RSS.image.height
            + "' src='" + RSS.image.url
            + "' " + "/>"; /*C2*/
    }


    /*D*/
    document.getElementById("chan_items").innerHTML = "";
    for (var i = 0; i < RSS.items.length; i++) {
        var myDate = (RSS.items[i].pubDate == null) ? null : new Date(RSS.items[i].pubDate);
        item_html = startItemTag;
        item_html += "<a name=" + i.toString() + "></a>";
        item_html += (myDate == null) ? "" : startDateTag + myDate.toLocaleString() + endTag;
        item_html += (RSS.items[i].title == null) ? "" : startTitle + '<strong class=/"active/">' + RSS.items[i].title + '</strong>' + endTag;
        if (showReadMore) {
            item_html += (RSS.items[i].description == null) ? "" : startDescription + RSS.items[i].description.substring(0, 100) + '...' + endTag;
            item_html += (RSS.items[i].link == null) ? "" : startLink + ' <a href=' + RSS.items[i].link + '>Read More</a>' + endTag;
        }
        else
            item_html += (RSS.items[i].description == null) ? "" : startDescription + RSS.items[i].description + endTag;
        item_html += endTag;
        item_html += "<div>&nbsp;</div>";
        document.getElementById("chan_items").innerHTML += item_html; /*D1*/
    }

    return true;
}