function getRSS(url)
{
    /*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*/

document.getElementById('waitImg').style.display = 'block';
    xhr.open("GET",url,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.responseXML != null)
                    processRSS(xhr.responseXML);
                else
                {
                    //alert("Failed to receive RSS file from the server - file not found.");
			  document.getElementById('chan_title').innerHTML = "Failed to receive RSS file from the server - file not found.";
			  document.getElementById('waitImg').style.display = 'none';
                    return false;
                }
            }
            else
		{
                //alert("Error code " + xhr.status + " received: " + xhr.statusText);
		    errStr = "Error code " + xhr.status + " received: " + xhr.statusText;
		    document.getElementById('chan_title').innerHTML = errStr;
		    document.getElementById('waitImg').style.display = 'none';
		}
        }
    }

    /*E*/
    xhr.send(null);

//document.getElementById('waitImg').style.display = 'none';
}



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




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*/
    count = Math.min(itemElements.length, 20);
    for (var i=0; i<count; 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 && tmpElement.childNodes[0]!=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");
        if(catElement.childNodes[0]!=null) 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.getElementsByTagName(imgAttribs[i])[0] != null)
                eval("this."+imgAttribs[i]+"=imgElement.getElementsByTagName('"+imgAttribs[i]+"')[0].childNodes[0].nodeValue");

		}
    }
}





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 && tmpElement.childNodes[0]!=null)
            eval("this."+properties[i]+"=tmpElement.textContent");
    }

    /*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;
    }
}



var clipboardString='';

function showRSS(RSS)
{
    /*A*/
    var imageTag = "<img id='chan_image' border=0 style='margin:4px;'";
    var startItemTag = "<div id='item'>";
    var startTitle = "<div id='item_title'>";
    var startLink = "<div id='item_link'>";
    var startDescription = "<div id='item_description' style='display:none;'>";
    var endTag = "</div>";


    /*C*/
    /*show the image*/
    document.getElementById("chan_image_link").innerHTML = "";
    if (RSS.image.url != null)
    {
        document.getElementById("chan_image_link").href = RSS.image.link; /*C1*/
        imageHTML = imageTag
            +" alt='"+RSS.title+"'";
        if(RSS.image.width>0)
		imageHTML += " width='" + RSS.image.width + "'";
	  if(RSS.image.height>0)
		imageHTML += " height='" + RSS.image.height + "'";
        imageHTML += "' src='"+RSS.image.url
            +"' "+"/>"; /*C2*/
	  document.getElementById("chan_image_link").innerHTML = imageHTML;
    }

    /*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*/
    }

    document.getElementById('chan_pubDate').innerHTML = '';
    channelDateString = '';
    bufChannelDateString = '';
    if(RSS.pubDate != null)
    {
	channelDate = new Date(RSS.pubDate);
	if(!isNaN(channelDate.getDay()))
	  {
		channelDateString = '[day]/[mon]/[year] [hour]:[min]:[sec]';
		channelDateString = channelDateString.replace("[day]", channelDate.getDate());
		channelDateString = channelDateString.replace('[mon]', channelDate.getMonth()+1);
		channelDateString = channelDateString.replace('[year]', channelDate.getFullYear());
		channelDateString = channelDateString.replace('[hour]', channelDate.getHours());
		channelDateString = channelDateString.replace('[min]', channelDate.getMinutes());
		channelDateString = channelDateString.replace('[sec]', channelDate.getSeconds());

		bufChannelDateString = channelDate.getDate() + '/' + (channelDate.getMonth()+1) + '/' + channelDate.getYear();
	  }
	else
	  {
		channelDateString = RSS.pubDate;
		bufChannelDateString = RSS.pubDate;
	  }

	document.getElementById('chan_pubDate').innerHTML = channelDateString;
    }


    clipboardString = "\r\n==================================================================\r\n" + RSS.title + "\r\n" + RSS.link + "\r\n";
    clipboardString += bufChannelDateString + "\r\n";
    if(RSS.copyright!=null) clipboardString += RSS.copyright + '\r\n\r\n';

    /*D*/
    document.getElementById("chan_items").innerHTML = "";
    for (var i=0; i<RSS.items.length; i++)
    {
        if(i%2==1)
		item_html = "<div class='feed_item_1'>";
	  else
		item_html = "<div class='feed_item_2'>";
        item_html += "<div>";
        item_html += (RSS.items[i].link == null) ? "" : "<a href='" + RSS.items[i].link + "' target='_blank'><img src='img/itemlink.gif' onmouseover='this.src="+'"'+"img/itemlink_over.gif"+'"'+";' onmouseout='this.src="+'"'+"img/itemlink.gif"+'"'+";' border=0></a> ";
        item_html += (RSS.items[i].title == null) ? "" : "<a href='javascript:void(0);' onClick='descShowHide("+'"item'+i+'"'+");'>" + RSS.items[i].title + "</a>";
        item_html += "</div>";
        item_html += (RSS.items[i].description == null) ? "" : "<div id='item" + i + "' style='display:none' class='item_desc'>" + RSS.items[i].description + "</div>";

	  dateString = '';
	  bufDateString = '';
	  if(RSS.items != null && RSS.items[i].pubDate != null)
	    {
		  itemDate = new Date(RSS.items[i].pubDate);
		  if(!isNaN(itemDate.getDay()))
		    {
			dateString = '[day]/[mon]/[year] [hour]:[min]:[sec]';
			dateString = dateString.replace("[day]", itemDate.getDate());
			dateString = dateString.replace('[mon]', itemDate.getMonth()+1);
			dateString = dateString.replace('[year]', itemDate.getFullYear());
			dateString = dateString.replace('[hour]', itemDate.getHours());
			dateString = dateString.replace('[min]', itemDate.getMinutes());
			dateString = dateString.replace('[sec]', itemDate.getSeconds());

			bufDateString = itemDate.getDate() + '/' + (itemDate.getMonth()+1) + '/' + itemDate.getYear();
		    }
		  else
		    {
			dateString = RSS.items[i].pubDate;
			bufDateString = RSS.items[i].pubDate;
		    }
		  item_html += "<div class='item_date'>" + dateString + "</div>";
	    }
        //item_html += (RSS.items[i].pubDate == null) ? "" : "<div class='item_date'>" + dateString + "</div>";
        item_html += "</div>";
        document.getElementById("chan_items").innerHTML += item_html; /*D1*/

	  clipboardString += "--------------------------------------\r\n" + RSS.items[i].title + "\r\n" + bufDateString + "\r\n" + RSS.items[i].description + "\r\n" + RSS.items[i].link + "\r\n\r\n";
    }

    document.getElementById('waitImg').style.display = 'none';
    return true;
}

function descShowHide(id)
{
	if(document.getElementById(id).style.display=='none') document.getElementById(id).style.display = 'block';
	else document.getElementById(id).style.display = 'none';
}


function copytobuff()
{
	if (window.clipboardData)
	  {
		window.clipboardData.setData('Text',clipboardString)
	  }
	else
	  {
        	alert('Ваш браузер не поддерживает операции с буфером обмена');
	  }
}