XSLT formatter in javascript

xslt.js

// Adapted from: http://www.w3schools.com/xsl/xsl_client.asp
Xslt: {
  
  // Transforms xml using the specified xsl and returns a document fragment.
  // The fragment may be added to the DOM using jQuery like this:
  //
  //   node = Xslt.transform("/example.xml", "/example.xsl");
  //   jQuery("#node_id").replaceWith(node);
  //
  transform: function(xml_url, xsl_url) {
    xml = this.load_xml(xml_url);
    xsl = this.load_xml(xsl_url);
  
    // code for IE
    if (window.ActiveXObject) {
      return xml.transformNode(xsl);
    }
    // code for Mozilla, Firefox, Opera, etc.
    else if (document.implementation && document.implementation.createDocument) {
      xsltProcessor = new XSLTProcessor();
      xsltProcessor.importStylesheet(xsl);
      return xsltProcessor.transformToFragment(xml, document);
    }
    else {
      alert('Your browser cannot use this script.  Try Firefox or Opera.');
    }
  },
  
  // Loads an xml document from the url.
  load_xml: function(url) { 
    var doc;
    // code for IE
    if (window.ActiveXObject) {
      doc = new ActiveXObject("Microsoft.XMLDOM");
    }
    // code for Mozilla, Firefox, Opera, etc.
    else if (document.implementation && document.implementation.createDocument) {
      doc = document.implementation.createDocument("","",null);
    }
    else {
      alert('Your browser cannot use this script. Try Firefox or Opera.');
    }
  
    doc.async = false;
    doc.load(url);
    return(doc);
  }
}