function updatePreview(btn_name) {

	document['btn_preview'].src = btn_name;
		
}

function setInputProperty(property, value) {
	
	$(".myinputstyle").css(property, value);	
}

function setProperty(el, property, value) {
	
	$(el).css(property, value);	
}

function setInputHoverProperty(property, value) {
	
	$(".myinputstyle").css(property, value);
}

function setLabelProperty(property, value) {
	
	$(".mylabelstyle").css(property, value);	
}

function showSetting(target) {

	if ($(target).css('display') == 'none') {
		$(target).BlindDown(500);
	} else {
		$(target).BlindUp(500);
	}
	return false;
}

function setButtonStyle(style, height){

	document.settings.style.value = style;
	//document.settings.h.value = height;
	$('#settings').ajaxSubmit(options);
}
 
function setDimension(dim) {
	
	document.settings.w.value = dim;
	document.settings.h.value = dim;
	$('#settings').ajaxSubmit(options);
}

function setButtonColor(color){

	document.settings.src.value = color;
	$('#settings').ajaxSubmit(options);
}

function URLEncode(CODE){

	var plaintext = CODE;
	var SAFECHARS = "0123456789" +					// Numeric
					"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +	// Alphabetic
					"abcdefghijklmnopqrstuvwxyz" +
					"-_.!~*'()";					
	var HEX = "0123456789ABCDEF";
	
	var encoded = "";
	for (var i = 0; i < plaintext.length; i++ ) {
		var ch = plaintext.charAt(i);
	    if (ch == " ") {
		    encoded += "+";				// x-www-urlencoded, rather than %20
		} else if (SAFECHARS.indexOf(ch) != -1) {
		    encoded += ch;
		} else {
		    var charCode = ch.charCodeAt(0);
			if (charCode > 255) {
			    alert( "Unicode Character '" + ch + "' cannot be encoded using standard URL encoding.\n" +
				        "(URL encoding only supports 8-bit characters.)\n" +
						"A space (+) will be substituted." );
				encoded += "+";
			} else {
				encoded += "%";
				encoded += HEX.charAt((charCode >> 4) & 0xF);
				encoded += HEX.charAt(charCode & 0xF);
			}
		}
	} // for

	// VALORE CODIFICATO
	return encoded;
}

function setButtonText(text){

	document.settings.text.value = URLEncode(text);
	$('#settings').ajaxSubmit(options);
}

function setButtonTextRow1(text){

	document.settings.text.value = 0;
	document.settings.textrow1.value = URLEncode(text);
	$('#settings').ajaxSubmit(options);
}

function setButtonTextRow2(text){

	document.settings.text.value = 0;
	document.settings.textrow2.value = URLEncode(text);
	$('#settings').ajaxSubmit(options);
}

function setButtonFont(font){

	document.settings.ttf.value = font;
	$('#settings').ajaxSubmit(options);
}	

/* called only in the click on the icons preloaded */
function setButtonIcon(icon){

	document.settings.icon_mode.value = 1;
	document.settings.icon.value = icon;
	$('#settings').ajaxSubmit(options);
}	

function setIconPosition(pos){

	document.settings.icon_position.value = pos;
	$('#settings').ajaxSubmit(options);
}

function setIconSize(size){

	document.settings.icon_size.value = size;
	$('#settings').ajaxSubmit(options);
}

function setFontDimension(size){

	document.settings.tsize.value = size;
	$('#settings').ajaxSubmit(options);
}	

function setIconMode(mode){
	
	document.settings.icon_mode.value = mode;
	$('#settings').ajaxSubmit(options);
}

function setGrayScale(chk){
	
	document.settings.grayscale.value = (chk.checked) ? '1' : '0';	
	$('#settings').ajaxSubmit(options);
}

function setGaussianBlur(chk){
	
	document.settings.gaussianblur.value = (chk.checked) ? '1' : '0';	
	$('#settings').ajaxSubmit(options);
}

function getRSS()
{
    /*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","http://www.mycoolbutton.com/blog/index.php/feed/",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 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*/
    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 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 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++)
    {
        item_html = startItemTag;
        item_html += (RSS.items[i].title == null) ? "" : startTitle + RSS.items[i].title + endTag;
        item_html += (RSS.items[i].link == null) ? "" : startLink + RSS.items[i].link + endTag;
        item_html += (RSS.items[i].description == null) ? "" : startDescription + RSS.items[i].description + endTag;
        item_html += endTag;
        document.getElementById("chan_items").innerHTML += item_html; /*D1*/
    }

    return true;
}