/*
 * xslt.js
 *
 * 2002, 2005
 *
 * Author: Johann Burkard - http://johannburkard.de
 *
 * Version 1.0
 *
 * XSL Transformations.
 */

/**
 * Browser supports XSLT.
 */
function browserSupportsXSLT() {
 var support = false;
 if (document.recalc) { // IE 5+
  support = true;
 }
 if (typeof XMLHttpRequest != 'undefined' && typeof XSLTProcessor != 'undefined'
  && typeof DOMParser != 'undefined' && typeof XMLSerializer != 'undefined') { // Mozilla 0.9.4+, Opera 9+
  support = true;
 }
 return support;
}

/**
 * Transform XML text and XSL text into the targetElement.
 * 
 * @param xml XML text or ID of the element containing XML (for IE)
 * @param xsl XSL text or ID of the element containing XSL (for IE)
 * @param targetElement element to write transform output to
 */
function transform(xml, xsl, targetElement) {
 if (document.recalc) {
  if (document.all[xml].readyState == 'complete' && document.all[xsl].readyState == 'complete') {
   document.all[targetElement].innerHTML = document.all[xml].transformNode(document.all[xsl].XMLDocument);
  }
 }
 else {
  var parser = new DOMParser();
  var xmlDoc = parser.parseFromString(xml, "text/xml");
  var xslDoc = parser.parseFromString(xsl, "text/xml");
  var resultDoc;
  var processor = new XSLTProcessor();

  if (typeof processor.transformDocument == 'function') {
   // obsolete Mozilla interface
   resultDoc = document.implementation.createDocument("", "", null);
   processor.transformDocument(xmlDoc, xslDoc, resultDoc, null);
  }

  else {
   processor.importStylesheet(xslDoc);
   var resultDoc = processor.transformToDocument(xmlDoc);
  }

  var out = new XMLSerializer().serializeToString(resultDoc);
  if (typeof processor.transformDocument == 'function') {
   out = out.replace(/&/g, "&");
  }
  document.getElementById(targetElement).innerHTML = out;
 }
}

/**
 * Transform an XML document.
 *
 * @param xml the URL of the XML document
 * @param xsl the URL of the XSL document
 * @param targetElement the target element
 */
function transformXML(xml, xsl, targetElement) {
 if (!browserSupportsXSLT()) {
  return;
 }
 if (document.recalc) {
  var id = Math.round(Math.random() * 10000);
  var out = "";
  out += '<xml id="xml' + id + '" src="' + xml + '" onreadystatechange="transform(\'xml' + id + '\', \'xsl' + id + '\', \'' + targetElement + '\')"><\/xml>';
  out += '<xml id="xsl' + id + '" src="' + xsl + '" onreadystatechange="transform(\'xml' + id + '\', \'xsl' + id + '\', \'' + targetElement + '\')"><\/xml>';
  document.body.insertAdjacentHTML("beforeEnd", out);
 }
 else {
  var xmlRequest = new XMLHttpRequest();
  var xslRequest = new XMLHttpRequest();
  xmlRequest.onreadystatechange = function() {
   if (xmlRequest.readyState == 4 && xslRequest.readyState == 4) {
    transform(xmlRequest.responseText, xslRequest.responseText, targetElement);
   }
  }
  xslRequest.onreadystatechange = function() {
   if (xmlRequest.readyState == 4 && xslRequest.readyState == 4) {
    transform(xmlRequest.responseText, xslRequest.responseText, targetElement);
   }
  }
  xmlRequest.open("GET", xml);
  xmlRequest.send(null);
  xslRequest.open("GET", xsl);
  xslRequest.send(null);
 }
}