/**
 * ====================================================================
 * 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 0.9.7.2
 * @author: Manos 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.PARSED_OK = "Document contains no parsing errors";
Sarissa.PARSED_EMPTY = "Document is empty";
Sarissa.PARSED_UNKNOWN_ERROR = "Not well-formed or other error";
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 && navigator.vendor && (navigator.userAgent.toLowerCase().indexOf("applewebkit") != -1 || navigator.vendor.indexOf("Apple") != -1));
var _SARISSA_IS_IE = document.all && window.ActiveXObject && navigator.userAgent.toLowerCase().indexOf("msie") > -1  && 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};
};

// 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;
    for(var i=0; i < idList.length && !bFound; i++){
      try{
        var oDoc = new ActiveXObject(idList[i]);
        o2Store = idList[i];
        bFound = true;
      }catch (objException){
        // trap; try next progID
      };
    };
    if (!bFound) {
      throw "Could not retreive 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.5.0", "Msxml2.XMLHTTP.4.0", "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.5.0", "Msxml2.DOMDocument.4.0", "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.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.5.0", "Msxml2.XSLTemplate.4.0", "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.5.0", "MSXML2.FreeThreadedDOMDocument.4.0", "MSXML2.FreeThreadedDOMDocument.3.0"]);
      _SARISSA_DOM_XMLWRITER = Sarissa.pickRecentProgID(["Msxml2.MXXMLWriter.5.0", "Msxml2.MXXMLWriter.4.0", "Msxml2.MXXMLWriter.3.0", "MSXML2.MXXMLWriter", "MSXML.MXXMLWriter", "Microsoft.XMLDOM"]);
    };
    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
    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();
    // (re)set default param values
    this.paramsSet = new Array();
  };

  /**
   * 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){
    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);
      }
      ownerDoc.removeChild(container);
    }
    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);
      }
      ownerDoc.removeChild(container);
    }
    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){
    /* 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 */
    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;
    };
  };
}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){

      //if(window.XMLDocument) , now mainly for opera  
    }// TODO: check if the new document has content before trying to copynodes, check  for error handling in DOM 3 LS
    else if(document.implementation && document.implementation.hasFeature && document.implementation.hasFeature('LS', '3.0')){

      /**
       * <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(!document.importNode && _SARISSA_IS_IE){
  try{
    /**
     * Implementation of importNode for the context window document in IE
     * @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 = document.createElement("div");
      if(bChildren){
        tmp.innerHTML = oNode.xml ? oNode.xml : oNode.innerHTML;
      }else{
        tmp.innerHTML = oNode.xml ? oNode.cloneNode(false).xml : oNode.cloneNode(false).innerHTML;
      };
      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((!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(ownerDoc.importNode)  {
    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(ownerDoc.importNode) {
      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 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 serializationj 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 itemKey = '';
    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