/*	This work is licensed under Creative Commons GNU LGPL License.

    License: http://creativecommons.org/licenses/LGPL/2.1/
   Version: 0.9
    Author:  Stefan Goessner/2006
    Web:     http://goessner.net/ 
*/
function xml2json(xml, tab) {
    var X = {
        toObj: function(xml) {
            var o = {};
            if (xml.nodeType == 1) { // element node ..
                if (xml.attributes.length) // element with attributes  ..
                for (var i = 0; i < xml.attributes.length; i++)
                o["@" + xml.attributes[i].nodeName] = (xml.attributes[i].nodeValue || "").toString();
                if (xml.firstChild) { // element has child nodes ..
                    var textChild = 0,
                        cdataChild = 0,
                        hasElementChild = false;
                    for (var n = xml.firstChild; n; n = n.nextSibling) {
                        if (n.nodeType == 1) hasElementChild = true;
                        else if (n.nodeType == 3 && n.nodeValue.match(/[^ \f\n\r\t\v]/)) textChild++; // non-whitespace text
                        else if (n.nodeType == 4) cdataChild++; // cdata section node
                    }
                    if (hasElementChild) {
                        if (textChild < 2 && cdataChild < 2) { // structured element with evtl. a single text or/and cdata node ..
                            X.removeWhite(xml);
                            for (var n = xml.firstChild; n; n = n.nextSibling) {
                                if (n.nodeType == 3) // text node
                                o["#text"] = X.escape(n.nodeValue);
                                else if (n.nodeType == 4) // cdata node
                                o["#cdata"] = X.escape(n.nodeValue);
                                else if (o[n.nodeName]) { // multiple occurence of element ..
                                    if (o[n.nodeName] instanceof Array) o[n.nodeName][o[n.nodeName].length] = X.toObj(n);
                                    else
                                    o[n.nodeName] = [o[n.nodeName], X.toObj(n)];
                                } else // first occurence of element..
                                o[n.nodeName] = X.toObj(n);
                            }
                        } else { // mixed content
                            if (!xml.attributes.length) o = X.escape(X.innerXml(xml));
                            else
                            o["#text"] = X.escape(X.innerXml(xml));
                        }
                    } else if (textChild) { // pure text
                        if (!xml.attributes.length) o = X.escape(X.innerXml(xml));
                        else
                        o["#text"] = X.escape(X.innerXml(xml));
                    } else if (cdataChild) { // cdata
                        if (cdataChild > 1) o = X.escape(X.innerXml(xml));
                        else
                        for (var n = xml.firstChild; n; n = n.nextSibling)
                        o["#cdata"] = X.escape(n.nodeValue);
                    }
                }
                if (!xml.attributes.length && !xml.firstChild) o = null;
            } else if (xml.nodeType == 9) { // document.node
                o = X.toObj(xml.documentElement);
            } else
            alert("unhandled node type: " + xml.nodeType);
            return o;
        },
        toJson: function(o, name, ind) {
            var json = name ? ("\"" + name + "\"") : "";
            if (o instanceof Array) {
                for (var i = 0, n = o.length; i < n; i++)
                o[i] = X.toJson(o[i], "", ind + "\t");
                json += (name ? ":[" : "[") + (o.length > 1 ? ("\n" + ind + "\t" + o.join(",\n" + ind + "\t") + "\n" + ind) : o.join("")) + "]";
            } else if (o == null) json += (name && ":") + "null";
            else if (typeof(o) == "object") {
                var arr = [];
                for (var m in o)
                arr[arr.length] = X.toJson(o[m], m, ind + "\t");
                json += (name ? ":{" : "{") + (arr.length > 1 ? ("\n" + ind + "\t" + arr.join(",\n" + ind + "\t") + "\n" + ind) : arr.join("")) + "}";
            } else if (typeof(o) == "string") json += (name && ":") + "\"" + o.toString() + "\"";
            else
            json += (name && ":") + o.toString();
            return json;
        },
        innerXml: function(node) {
            var s = ""
            if ("innerHTML" in node) s = node.innerHTML;
            else {
                var asXml = function(n) {
                    var s = "";
                    if (n.nodeType == 1) {
                        s += "<" + n.nodeName;
                        for (var i = 0; i < n.attributes.length; i++)
                        s += " " + n.attributes[i].nodeName + "=\"" + (n.attributes[i].nodeValue || "").toString() + "\"";
                        if (n.firstChild) {
                            s += ">";
                            for (var c = n.firstChild; c; c = c.nextSibling)
                            s += asXml(c);
                            s += "</" + n.nodeName + ">";
                        } else
                        s += "/>";
                    } else if (n.nodeType == 3) s += n.nodeValue;
                    else if (n.nodeType == 4) s += "<![CDATA[" + n.nodeValue + "]]>";
                    return s;
                };
                for (var c = node.firstChild; c; c = c.nextSibling)
                s += asXml(c);
            }
            return s;
        },
        escape: function(txt) {
            return txt.replace(/[\\]/g, "\\\\").replace(/[\"]/g, '\\"').replace(/[\n]/g, '\\n').replace(/[\r]/g, '\\r');
        },
        removeWhite: function(e) {
        	if(e != null){
	            e.normalize();
	            for (var n = e.firstChild; n;) {
	                if (n.nodeType == 3) { // text node
	                    if (!n.nodeValue.match(/[^ \f\n\r\t\v]/)) { // pure whitespace text node
	                        var nxt = n.nextSibling;
	                        e.removeChild(n);
	                        n = nxt;
	                    } else
	                    n = n.nextSibling;
	                } else if (n.nodeType == 1) { // element node
	                    X.removeWhite(n);
	                    n = n.nextSibling;
	                } else // any other node
	                n = n.nextSibling;
	            }
        	}
            return e;
        }
    };
    if (xml.nodeType == 9) // document node
    xml = xml.documentElement;
    var json = X.toJson(X.toObj(X.removeWhite(xml)), xml.nodeName, "\t");
    return "{\n" + (tab ? json.replace(/\t/g, tab) : json.replace(/\t|\n/g, "")) + "\n}";
}


function parseXml(xml) {
	   var dom = null;
	   if (window.DOMParser) {
	      try { 
	         dom = (new DOMParser()).parseFromString(xml, "text/xml"); 
	      } 
	      catch (e) { dom = null; }
	   }
	   else if (window.ActiveXObject) {
	      try {
	         dom = new ActiveXObject('Microsoft.XMLDOM');
	         dom.async = false;
	         if (!dom.loadXML(xml)) // parse error ..

	            window.alert(dom.parseError.reason + dom.parseError.srcText);
	      } 
	      catch (e) { dom = null; }
	   }
	   else
	      alert("cannot parse xml string!");
	   return dom;
	}