/**
* ====================================================================
* About
* ====================================================================
* Sarissa is an ECMAScript library acting as a cross-browser wrapper for native XML APIs.
* The library supports Gecko based browsers like Mozilla and Firefox,
* Internet Explorer (5.5+ with MSXML3.0+), Konqueror, Safari and a little of Opera
* @version ${project.version}
* @author: @author: Copyright 2004-2007 Emmanouil Batsis, mailto: mbatsis at users full stop sourceforge full stop net
*
* ====================================================================
* Licence
* ====================================================================
* Sarissa is free software distributed under the GNU GPL version 2 (see <a href="gpl.txt">gpl.txt</a>) or higher, 
* GNU LGPL version 2.1 (see <a href="lgpl.txt">lgpl.txt</a>) or higher and Apache Software License 2.0 or higher 
* (see <a href="asl.txt">asl.txt</a>). This means you can choose one of the three and use that if you like. If 
* you make modifications under the ASL, i would appreciate it if you submitted those.
* In case your copy of Sarissa does not include the license texts, you may find
* them online in various formats at <a href="http://www.gnu.org">http://www.gnu.org</a> and 
* <a href="http://www.apache.org">http://www.apache.org</a>.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
* KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
* WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE 
* AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* <p>Sarissa is a utility class. Provides "static" methods for DOMDocument, 
* DOM Node serialization to XML strings and other utility goodies.</p>
* @constructor
*/
function Sarissa() { };
Sarissa.VERSION = "${project.version}";
Sarissa.PARSED_OK = "Document contains no parsing errors";
Sarissa.PARSED_EMPTY = "Document is empty";
Sarissa.PARSED_UNKNOWN_ERROR = "Not well-formed or other error";
Sarissa.IS_ENABLED_TRANSFORM_NODE = false;
var _sarissa_iNsCounter = 0;
var _SARISSA_IEPREFIX4XSLPARAM = "";
var _SARISSA_HAS_DOM_IMPLEMENTATION = document.implementation && true;
var _SARISSA_HAS_DOM_CREATE_DOCUMENT = _SARISSA_HAS_DOM_IMPLEMENTATION && document.implementation.createDocument;
var _SARISSA_HAS_DOM_FEATURE = _SARISSA_HAS_DOM_IMPLEMENTATION && document.implementation.hasFeature;
var _SARISSA_IS_MOZ = _SARISSA_HAS_DOM_CREATE_DOCUMENT && _SARISSA_HAS_DOM_FEATURE;
var _SARISSA_IS_SAFARI = navigator.userAgent.toLowerCase().indexOf("safari") != -1 || navigator.userAgent.toLowerCase().indexOf("konqueror") != -1;
var _SARISSA_IS_SAFARI_OLD = _SARISSA_IS_SAFARI && parseInt((navigator.userAgent.match(/AppleWebKit\/(\d+)/) || {})[1]) < 420;
var _SARISSA_IS_IE = document.all && window.ActiveXObject && navigator.userAgent.toLowerCase().indexOf("msie") > -1 && navigator.userAgent.toLowerCase().indexOf("opera") == -1;
var _SARISSA_IS_OPERA = navigator.userAgent.toLowerCase().indexOf("opera") != -1;
if (!window.Node || !Node.ELEMENT_NODE) {
    Node = { ELEMENT_NODE: 1, ATTRIBUTE_NODE: 2, TEXT_NODE: 3, CDATA_SECTION_NODE: 4, ENTITY_REFERENCE_NODE: 5, ENTITY_NODE: 6, PROCESSING_INSTRUCTION_NODE: 7, COMMENT_NODE: 8, DOCUMENT_NODE: 9, DOCUMENT_TYPE_NODE: 10, DOCUMENT_FRAGMENT_NODE: 11, NOTATION_NODE: 12 };
};

//This breaks for(x in o) loops in the old Safari
if (_SARISSA_IS_SAFARI_OLD) {
    HTMLHtmlElement = document.createElement("html").constructor;
    Node = HTMLElement = {};
    HTMLElement.prototype = HTMLHtmlElement.__proto__.__proto__;
    HTMLDocument = Document = document.constructor;
    var x = new DOMParser();
    XMLDocument = x.constructor;
    Element = x.parseFromString("<Single />", "text/xml").documentElement.constructor;
    x = null;
}
if (typeof XMLDocument == "undefined" && typeof Document != "undefined") { XMLDocument = Document; }

// IE initialization
if (_SARISSA_IS_IE) {
    // for XSLT parameter names, prefix needed by IE
    _SARISSA_IEPREFIX4XSLPARAM = "xsl:";
    // used to store the most recent ProgID available out of the above
    var _SARISSA_DOM_PROGID = "";
    var _SARISSA_XMLHTTP_PROGID = "";
    var _SARISSA_DOM_XMLWRITER = "";
    /**
    * Called when the Sarissa_xx.js file is parsed, to pick most recent
    * ProgIDs for IE, then gets destroyed.
    * @private
    * @param idList an array of MSXML PROGIDs from which the most recent will be picked for a given object
    * @param enabledList an array of arrays where each array has two items; the index of the PROGID for which a certain feature is enabled
    */
    Sarissa.pickRecentProgID = function (idList) {
        // found progID flag
        var bFound = false, e;
        for (var i = 0; i < idList.length && !bFound; i++) {
            try {
                var oDoc = new ActiveXObject(idList[i]);
                var o2Store = idList[i];
                bFound = true;
            } catch (objException) {
                // trap; try next progID
                e = objException;
            };
        };
        if (!bFound) {
            throw "Could not retrieve a valid progID of Class: " + idList[idList.length - 1] + ". (original exception: " + e + ")";
        };
        idList = null;
        return o2Store;
    };
    // pick best available MSXML progIDs
    _SARISSA_DOM_PROGID = null;
    _SARISSA_THREADEDDOM_PROGID = null;
    _SARISSA_XSLTEMPLATE_PROGID = null;
    _SARISSA_XMLHTTP_PROGID = null;
    if (!window.XMLHttpRequest) {
        /**
        * Emulate XMLHttpRequest
        * @constructor
        */
        XMLHttpRequest = function () {
            if (!_SARISSA_XMLHTTP_PROGID) {
                _SARISSA_XMLHTTP_PROGID = Sarissa.pickRecentProgID(["Msxml2.XMLHTTP.6.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"]);
            };
            return new ActiveXObject(_SARISSA_XMLHTTP_PROGID);
        };
    };
    // we dont need this anymore
    //============================================
    // Factory methods (IE)
    //============================================
    // see non-IE version
    Sarissa.getDomDocument = function (sUri, sName) {
        if (!_SARISSA_DOM_PROGID) {
            _SARISSA_DOM_PROGID = Sarissa.pickRecentProgID(["Msxml2.DOMDocument.6.0", "Msxml2.DOMDocument.3.0", "MSXML2.DOMDocument", "MSXML.DOMDocument", "Microsoft.XMLDOM"]);
        };
        var oDoc = new ActiveXObject(_SARISSA_DOM_PROGID);
        // if a root tag name was provided, we need to load it in the DOM object
        if (sName) {
            // create an artifical namespace prefix 
            // or reuse existing prefix if applicable
            var prefix = "";
            if (sUri) {
                if (sName.indexOf(":") > 1) {
                    prefix = sName.substring(0, sName.indexOf(":"));
                    sName = sName.substring(sName.indexOf(":") + 1);
                } else {
                    prefix = "a" + (_sarissa_iNsCounter++);
                };
            };
            // use namespaces if a namespace URI exists
            if (sUri) {
                oDoc.loadXML('<' + prefix + ':' + sName + " xmlns:" + prefix + "=\"" + sUri + "\"" + " />");
            } else {
                oDoc.loadXML('<' + sName + " />");
            };
        };
        return oDoc;
    };
    // see non-IE version   
    Sarissa.getParseErrorText = function (oDoc) {
        var parseErrorText = Sarissa.PARSED_OK;
        if (oDoc && oDoc.parseError && oDoc.parseError.errorCode && oDoc.parseError.errorCode != 0) {
            parseErrorText = "XML Parsing Error: " + oDoc.parseError.reason +
                "\nLocation: " + oDoc.parseError.url +
                "\nLine Number " + oDoc.parseError.line + ", Column " +
                oDoc.parseError.linepos +
                ":\n" + oDoc.parseError.srcText +
                "\n";
            for (var i = 0; i < oDoc.parseError.linepos; i++) {
                parseErrorText += "-";
            };
            parseErrorText += "^\n";
        }
        else if (oDoc.documentElement == null) {
            parseErrorText = Sarissa.PARSED_EMPTY;
        };
        return parseErrorText;
    };
    // see non-IE version
    Sarissa.setXpathNamespaces = function (oDoc, sNsSet) {
        oDoc.setProperty("SelectionLanguage", "XPath");
        oDoc.setProperty("SelectionNamespaces", sNsSet);
    };
    /**
    * Basic implementation of Mozilla's XSLTProcessor for IE. 
    * Reuses the same XSLT stylesheet for multiple transforms
    * @constructor
    */
    XSLTProcessor = function () {
        if (!_SARISSA_XSLTEMPLATE_PROGID) {
            _SARISSA_XSLTEMPLATE_PROGID = Sarissa.pickRecentProgID(["Msxml2.XSLTemplate.6.0", "MSXML2.XSLTemplate.3.0"]);
        };
        this.template = new ActiveXObject(_SARISSA_XSLTEMPLATE_PROGID);
        this.processor = null;
    };
    /**
    * Imports the given XSLT DOM and compiles it to a reusable transform
    * <b>Note:</b> If the stylesheet was loaded from a URL and contains xsl:import or xsl:include elements,it will be reloaded to resolve those
    * @argument xslDoc The XSLT DOMDocument to import
    */
    XSLTProcessor.prototype.importStylesheet = function (xslDoc) {
        if (!_SARISSA_THREADEDDOM_PROGID) {
            _SARISSA_THREADEDDOM_PROGID = Sarissa.pickRecentProgID(["MSXML2.FreeThreadedDOMDocument.6.0", "MSXML2.FreeThreadedDOMDocument.3.0"]);
        };
        xslDoc.setProperty("SelectionLanguage", "XPath");
        xslDoc.setProperty("SelectionNamespaces", "xmlns:xsl='http://www.w3.org/1999/XSL/Transform'");
        // convert stylesheet to free threaded
        var converted = new ActiveXObject(_SARISSA_THREADEDDOM_PROGID);
        // make included/imported stylesheets work if exist and xsl was originally loaded from url
        try {
            converted.resolveExternals = true;
            converted.setProperty("AllowDocumentFunction", true);
        }
        catch (e) {
            // Ignore. "AllowDocumentFunction" is only supported in MSXML 3.0 SP4 and later.
        };
        if (xslDoc.url && xslDoc.selectSingleNode("//xsl:*[local-name() = 'import' or local-name() = 'include']") != null) {
            converted.async = false;
            converted.load(xslDoc.url);
        } else {
            converted.loadXML(xslDoc.xml);
        };
        converted.setProperty("SelectionNamespaces", "xmlns:xsl='http://www.w3.org/1999/XSL/Transform'");
        var output = converted.selectSingleNode("//xsl:output");
        this.outputMethod = output ? output.getAttribute("method") : "html";
        this.template.stylesheet = converted;
        this.processor = this.template.createProcessor();
        // for getParameter and clearParameters
        this.paramsSet = [];
    };

    /**
    * Transform the given XML DOM and return the transformation result as a new DOM document
    * @argument sourceDoc The XML DOMDocument to transform
    * @return The transformation result as a DOM Document
    */
    XSLTProcessor.prototype.transformToDocument = function (sourceDoc) {
        // fix for bug 1549749
        if (_SARISSA_THREADEDDOM_PROGID) {
            this.processor.input = sourceDoc;
            var outDoc = new ActiveXObject(_SARISSA_DOM_PROGID);
            this.processor.output = outDoc;
            this.processor.transform();
            return outDoc;
        }
        else {
            if (!_SARISSA_DOM_XMLWRITER) {
                _SARISSA_DOM_XMLWRITER = Sarissa.pickRecentProgID(["Msxml2.MXXMLWriter.6.0", "Msxml2.MXXMLWriter.3.0", "MSXML2.MXXMLWriter", "MSXML.MXXMLWriter", "Microsoft.XMLDOM"]);
            };
            this.processor.input = sourceDoc;
            var outDoc = new ActiveXObject(_SARISSA_DOM_XMLWRITER);
            this.processor.output = outDoc;
            this.processor.transform();
            var oDoc = new ActiveXObject(_SARISSA_DOM_PROGID);
            oDoc.loadXML(outDoc.output + "");
            return oDoc;
        };
    };

    /**
    * Transform the given XML DOM and return the transformation result as a new DOM fragment.
    * <b>Note</b>: The xsl:output method must match the nature of the owner document (XML/HTML).
    * @argument sourceDoc The XML DOMDocument to transform
    * @argument ownerDoc The owner of the result fragment
    * @return The transformation result as a DOM Document
    */
    XSLTProcessor.prototype.transformToFragment = function (sourceDoc, ownerDoc) {
        this.processor.input = sourceDoc;
        this.processor.transform();
        var s = this.processor.output;
        var f = ownerDoc.createDocumentFragment();
        if (this.outputMethod == 'text') {
            f.appendChild(ownerDoc.createTextNode(s));
        } else if (ownerDoc.body && ownerDoc.body.innerHTML) {
            var container = ownerDoc.createElement('div');
            container.innerHTML = s;
            while (container.hasChildNodes()) {
                f.appendChild(container.firstChild);
            }
        }
        else {
            var oDoc = new ActiveXObject(_SARISSA_DOM_PROGID);
            if (s.substring(0, 5) == '<?xml') {
                s = s.substring(s.indexOf('?>') + 2);
            }
            var xml = ''.concat('<my>', s, '</my>');
            oDoc.loadXML(xml);
            var container = oDoc.documentElement;
            while (container.hasChildNodes()) {
                f.appendChild(container.firstChild);
            }
        }
        return f;
    };

    /**
    * Set global XSLT parameter of the imported stylesheet
    * @argument nsURI The parameter namespace URI
    * @argument name The parameter base name
    * @argument value The new parameter value
    */
    XSLTProcessor.prototype.setParameter = function (nsURI, name, value) {
        // make value a zero length string if null to allow clearing
        value = value ? value : "";
        // nsURI is optional but cannot be null
        if (nsURI) {
            this.processor.addParameter(name, value, nsURI);
        } else {
            this.processor.addParameter(name, value);
        };
        // update updated params for getParameter
        nsURI = "" + (nsURI || "");
        if (!this.paramsSet[nsURI]) {
            this.paramsSet[nsURI] = new Array();
        };
        this.paramsSet[nsURI][name] = value;
    };
    /**
    * Gets a parameter if previously set by setParameter. Returns null
    * otherwise
    * @argument name The parameter base name
    * @argument value The new parameter value
    * @return The parameter value if reviously set by setParameter, null otherwise
    */
    XSLTProcessor.prototype.getParameter = function (nsURI, name) {
        nsURI = "" + (nsURI || "");
        if (this.paramsSet[nsURI] && this.paramsSet[nsURI][name]) {
            return this.paramsSet[nsURI][name];
        } else {
            return null;
        };
    };
    /**
    * Clear parameters (set them to default values as defined in the stylesheet itself)
    */
    XSLTProcessor.prototype.clearParameters = function () {
        for (var nsURI in this.paramsSet) {
            for (var name in this.paramsSet[nsURI]) {
                if (nsURI != "") {
                    this.processor.addParameter(name, "", nsURI);
                } else {
                    this.processor.addParameter(name, "");
                };
            };
        };
        this.paramsSet = new Array();
    };
} else { /* end IE initialization, try to deal with real browsers now ;-) */
    if (_SARISSA_HAS_DOM_CREATE_DOCUMENT) {
        /**
        * <p>Ensures the document was loaded correctly, otherwise sets the
        * parseError to -1 to indicate something went wrong. Internal use</p>
        * @private
        */
        Sarissa.__handleLoad__ = function (oDoc) {
            Sarissa.__setReadyState__(oDoc, 4);
        };
        /**
        * <p>Attached by an event handler to the load event. Internal use.</p>
        * @private
        */
        _sarissa_XMLDocument_onload = function () {
            Sarissa.__handleLoad__(this);
        };
        /**
        * <p>Sets the readyState property of the given DOM Document object.
        * Internal use.</p>
        * @private
        * @argument oDoc the DOM Document object to fire the
        *          readystatechange event
        * @argument iReadyState the number to change the readystate property to
        */
        Sarissa.__setReadyState__ = function (oDoc, iReadyState) {
            oDoc.readyState = iReadyState;
            oDoc.readystate = iReadyState;
            if (oDoc.onreadystatechange != null && typeof oDoc.onreadystatechange == "function") {
                oDoc.onreadystatechange();
            }
        };
        Sarissa.getDomDocument = function (sUri, sName) {
            var oDoc = document.implementation.createDocument(sUri ? sUri : null, sName ? sName : null, null);
            if (!oDoc.onreadystatechange) {

                /**
                * <p>Emulate IE's onreadystatechange attribute</p>
                */
                oDoc.onreadystatechange = null;
            };
            if (!oDoc.readyState) {
                /**
                * <p>Emulates IE's readyState property, which always gives an integer from 0 to 4:</p>
                * <ul><li>1 == LOADING,</li>
                * <li>2 == LOADED,</li>
                * <li>3 == INTERACTIVE,</li>
                * <li>4 == COMPLETED</li></ul>
                */
                oDoc.readyState = 0;
            };
            oDoc.addEventListener("load", _sarissa_XMLDocument_onload, false);
            return oDoc;
        };
        if (window.XMLDocument) {
            // do nothing
        } // TODO: check if the new document has content before trying to copynodes, check  for error handling in DOM 3 LS
        else if (_SARISSA_HAS_DOM_FEATURE && window.Document && !Document.prototype.load && document.implementation.hasFeature('LS', '3.0')) {
            //Opera 9 may get the XPath branch which gives creates XMLDocument, therefore it doesn't reach here which is good
            /**
            * <p>Factory method to obtain a new DOM Document object</p>
            * @argument sUri the namespace of the root node (if any)
            * @argument sUri the local name of the root node (if any)
            * @returns a new DOM Document
            */
            Sarissa.getDomDocument = function (sUri, sName) {
                var oDoc = document.implementation.createDocument(sUri ? sUri : null, sName ? sName : null, null);
                return oDoc;
            };
        }
        else {
            Sarissa.getDomDocument = function (sUri, sName) {
                var oDoc = document.implementation.createDocument(sUri ? sUri : null, sName ? sName : null, null);
                // looks like safari does not create the root element for some unknown reason
                if (oDoc && (sUri || sName) && !oDoc.documentElement) {
                    oDoc.appendChild(oDoc.createElementNS(sUri, sName));
                };
                return oDoc;
            };
        };
    }; //if(_SARISSA_HAS_DOM_CREATE_DOCUMENT)
};
//==========================================
// Common stuff
//==========================================
if (!window.DOMParser) {
    if (_SARISSA_IS_SAFARI) {
        /*
        * DOMParser is a utility class, used to construct DOMDocuments from XML strings
        * @constructor
        */
        DOMParser = function () { };
        /** 
        * Construct a new DOM Document from the given XMLstring
        * @param sXml the given XML string
        * @param contentType the content type of the document the given string represents (one of text/xml, application/xml, application/xhtml+xml). 
        * @return a new DOM Document from the given XML string
        */
        DOMParser.prototype.parseFromString = function (sXml, contentType) {
            var xmlhttp = new XMLHttpRequest();
            xmlhttp.open("GET", "data:text/xml;charset=utf-8," + encodeURIComponent(sXml), false);
            xmlhttp.send(null);
            return xmlhttp.responseXML;
        };
    } else if (Sarissa.getDomDocument && Sarissa.getDomDocument() && Sarissa.getDomDocument(null, "bar").xml) {
        DOMParser = function () { };
        DOMParser.prototype.parseFromString = function (sXml, contentType) {
            var doc = Sarissa.getDomDocument();
            doc.loadXML(sXml);
            return doc;
        };
    };
};

if ((typeof (document.importNode) == "undefined") && _SARISSA_IS_IE) {
    try {
        /**
        * Implementation of importNode for the context window document in IE.
        * If <code>oNode</code> is a TextNode, <code>bChildren</code> is ignored.
        * @param oNode the Node to import
        * @param bChildren whether to include the children of oNode
        * @returns the imported node for further use
        */
        document.importNode = function (oNode, bChildren) {
            var tmp;
            if (oNode.nodeName == '#text') {
                return document.createTextElement(oNode.data);
            }
            else {
                if (oNode.nodeName == "tbody" || oNode.nodeName == "tr") {
                    tmp = document.createElement("table");
                }
                else if (oNode.nodeName == "td") {
                    tmp = document.createElement("tr");
                }
                else if (oNode.nodeName == "option") {
                    tmp = document.createElement("select");
                }
                else {
                    tmp = document.createElement("div");
                };
                if (bChildren) {
                    tmp.innerHTML = oNode.xml ? oNode.xml : oNode.outerHTML;
                } else {
                    tmp.innerHTML = oNode.xml ? oNode.cloneNode(false).xml : oNode.cloneNode(false).outerHTML;
                };
                return tmp.getElementsByTagName("*")[0];
            };

        };
    } catch (e) { };
};
if (!Sarissa.getParseErrorText) {
    /**
    * <p>Returns a human readable description of the parsing error. Usefull
    * for debugging. Tip: append the returned error string in a &lt;pre&gt;
    * element if you want to render it.</p>
    * <p>Many thanks to Christian Stocker for the initial patch.</p>
    * @argument oDoc The target DOM document
    * @returns The parsing error description of the target Document in
    *          human readable form (preformated text)
    */
    Sarissa.getParseErrorText = function (oDoc) {
        var parseErrorText = Sarissa.PARSED_OK;
        if (!oDoc.documentElement) {
            parseErrorText = Sarissa.PARSED_EMPTY;
        } else if (oDoc.documentElement.tagName == "parsererror") {
            parseErrorText = oDoc.documentElement.firstChild.data;
            parseErrorText += "\n" + oDoc.documentElement.firstChild.nextSibling.firstChild.data;
        } else if (oDoc.getElementsByTagName("parsererror").length > 0) {
            var parsererror = oDoc.getElementsByTagName("parsererror")[0];
            parseErrorText = Sarissa.getText(parsererror, true) + "\n";
        } else if (oDoc.parseError && oDoc.parseError.errorCode != 0) {
            parseErrorText = Sarissa.PARSED_UNKNOWN_ERROR;
        };
        return parseErrorText;
    };
};
Sarissa.getText = function (oNode, deep) {
    var s = "";
    var nodes = oNode.childNodes;
    for (var i = 0; i < nodes.length; i++) {
        var node = nodes[i];
        var nodeType = node.nodeType;
        if (nodeType == Node.TEXT_NODE || nodeType == Node.CDATA_SECTION_NODE) {
            s += node.data;
        } else if (deep == true
                    && (nodeType == Node.ELEMENT_NODE
                        || nodeType == Node.DOCUMENT_NODE
                        || nodeType == Node.DOCUMENT_FRAGMENT_NODE)) {
            s += Sarissa.getText(node, true);
        };
    };
    return s;
};
if (!window.XMLSerializer
    && Sarissa.getDomDocument
    && Sarissa.getDomDocument("", "foo", null).xml) {
    /**
    * Utility class to serialize DOM Node objects to XML strings
    * @constructor
    */
    XMLSerializer = function () { };
    /**
    * Serialize the given DOM Node to an XML string
    * @param oNode the DOM Node to serialize
    */
    XMLSerializer.prototype.serializeToString = function (oNode) {
        return oNode.xml;
    };
};

/**
* strips tags from a markup string
*/
Sarissa.stripTags = function (s) {
    return s.replace(/<[^>]+>/g, "");
};
/**
* <p>Deletes all child nodes of the given node</p>
* @argument oNode the Node to empty
*/
Sarissa.clearChildNodes = function (oNode) {
    // need to check for firstChild due to opera 8 bug with hasChildNodes
    while (oNode.firstChild) {
        oNode.removeChild(oNode.firstChild);
    };
};
/**
* <p> Copies the childNodes of nodeFrom to nodeTo</p>
* <p> <b>Note:</b> The second object's original content is deleted before 
* the copy operation, unless you supply a true third parameter</p>
* @argument nodeFrom the Node to copy the childNodes from
* @argument nodeTo the Node to copy the childNodes to
* @argument bPreserveExisting whether to preserve the original content of nodeTo, default is false
*/
Sarissa.copyChildNodes = function (nodeFrom, nodeTo, bPreserveExisting) {
    if (_SARISSA_IS_SAFARI && nodeTo.nodeType == Node.DOCUMENT_NODE) { // SAFARI_OLD ??
        nodeTo = nodeTo.documentElement; //Appearantly there's a bug in safari where you can't appendChild to a document node
    }

    if ((!nodeFrom) || (!nodeTo)) {
        throw "Both source and destination nodes must be provided";
    };
    if (!bPreserveExisting) {
        Sarissa.clearChildNodes(nodeTo);
    };
    var ownerDoc = nodeTo.nodeType == Node.DOCUMENT_NODE ? nodeTo : nodeTo.ownerDocument;
    var nodes = nodeFrom.childNodes;
    if (typeof (ownerDoc.importNode) != "undefined") {
        for (var i = 0; i < nodes.length; i++) {
            nodeTo.appendChild(ownerDoc.importNode(nodes[i], true));
        };
    } else {
        for (var i = 0; i < nodes.length; i++) {
            nodeTo.appendChild(nodes[i].cloneNode(true));
        };
    };
};

/**
* <p> Moves the childNodes of nodeFrom to nodeTo</p>
* <p> <b>Note:</b> The second object's original content is deleted before 
* the move operation, unless you supply a true third parameter</p>
* @argument nodeFrom the Node to copy the childNodes from
* @argument nodeTo the Node to copy the childNodes to
* @argument bPreserveExisting whether to preserve the original content of nodeTo, default is
*/
Sarissa.moveChildNodes = function (nodeFrom, nodeTo, bPreserveExisting) {
    if ((!nodeFrom) || (!nodeTo)) {
        throw "Both source and destination nodes must be provided";
    };
    if (!bPreserveExisting) {
        Sarissa.clearChildNodes(nodeTo);
    };
    var nodes = nodeFrom.childNodes;
    // if within the same doc, just move, else copy and delete
    if (nodeFrom.ownerDocument == nodeTo.ownerDocument) {
        while (nodeFrom.firstChild) {
            nodeTo.appendChild(nodeFrom.firstChild);
        };
    } else {
        var ownerDoc = nodeTo.nodeType == Node.DOCUMENT_NODE ? nodeTo : nodeTo.ownerDocument;
        if (typeof (ownerDoc.importNode) != "undefined") {
            for (var i = 0; i < nodes.length; i++) {
                nodeTo.appendChild(ownerDoc.importNode(nodes[i], true));
            };
        } else {
            for (var i = 0; i < nodes.length; i++) {
                nodeTo.appendChild(nodes[i].cloneNode(true));
            };
        };
        Sarissa.clearChildNodes(nodeFrom);
    };
};

/** 
* <p>Serialize any <strong>non</strong> DOM object to an XML string. All properties are serialized using the property name
* as the XML element name. Array elements are rendered as <code>array-item</code> elements, 
* using their index/key as the value of the <code>key</code> attribute.</p>
* @argument anyObject the object to serialize
* @argument objectName a name for that object
* @return the XML serialization of the given object as a string
*/
Sarissa.xmlize = function (anyObject, objectName, indentSpace) {
    indentSpace = indentSpace ? indentSpace : '';
    var s = indentSpace + '<' + objectName + '>';
    var isLeaf = false;
    if (!(anyObject instanceof Object) || anyObject instanceof Number || anyObject instanceof String
        || anyObject instanceof Boolean || anyObject instanceof Date) {
        s += Sarissa.escape("" + anyObject);
        isLeaf = true;
    } else {
        s += "\n";
        var isArrayItem = anyObject instanceof Array;
        for (var name in anyObject) {
            s += Sarissa.xmlize(anyObject[name], (isArrayItem ? "array-item key=\"" + name + "\"" : name), indentSpace + "   ");
        };
        s += indentSpace;
    };
    return (s += (objectName.indexOf(' ') != -1 ? "</array-item>\n" : "</" + objectName + ">\n"));
};

/** 
* Escape the given string chacters that correspond to the five predefined XML entities
* @param sXml the string to escape
*/
Sarissa.escape = function (sXml) {
    return sXml.replace(/&/g, "&amp;")
        .replace(/</g, "&lt;")
        .replace(/>/g, "&gt;")
        .replace(/"/g, "&quot;")
        .replace(/'/g, "&apos;");
};

/** 
* Unescape the given string. This turns the occurences of the predefined XML 
* entities to become the characters they represent correspond to the five predefined XML entities
* @param sXml the string to unescape
*/
Sarissa.unescape = function (sXml) {
    return sXml.replace(/&apos;/g, "'")
        .replace(/&quot;/g, "\"")
        .replace(/&gt;/g, ">")
        .replace(/&lt;/g, "<")
        .replace(/&amp;/g, "&");
};
//   EOF