/*
Copyright (c) 2006 Andrew Yermakov. All rights reserved.
version 0.9
*/
  function nodeData(id, path) {
    this.id = id;
    this.path = path;
  }

  function makeRequest(url, node, onCompleteCallback) {
    var http_request = false;
  
    if (window.XMLHttpRequest) {
      http_request = new XMLHttpRequest();
      if (http_request.overrideMimeType) {
        http_request.overrideMimeType('text/xml');
      }
      browser = 'mozilla';
    } else if (window.ActiveXObject) {
      browser = 'IE';
      try {
        http_request = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {}
      }
    }

    if (!http_request) {
      alert('Giving up :( Cannot create an XMLHTTP instance');
    }
    http_request.onreadystatechange = function() { processContents(http_request, node, onCompleteCallback); };
    http_request.open('GET', url, true);
    http_request.send(null);
  }
    
  function processContents(http_request, node, onCompleteCallback) {
    var tmpNode;
    if (http_request.readyState == 4) {
      if (http_request.status == 200) {

        if (browser == 'IE') {
          var xmldoc = new ActiveXObject("Msxml2.DOMDocument.3.0");
          xmldoc.loadXML(http_request.responseText);
        } else {
          var xmldoc = http_request.responseXML;
        }

        var root_node = xmldoc.getElementsByTagName('category');
        for (i = 0; i < root_node.length; i++) {
          var id = root_node.item(i).getElementsByTagName('id').item(0).firstChild.data;
          var childCount = root_node.item(i).getElementsByTagName('childcount').item(0).firstChild.data;
          var productsCount = root_node.item(i).getElementsByTagName('productscount').item(0).firstChild.data;
          var multiExpand = root_node.item(i).getElementsByTagName('multiexpand').item(0).firstChild.data;
          var path = node.data.path + "_" + id;
          var href_str = root_node.item(i).getElementsByTagName('href').item(0).firstChild.data;
        
          if (productsCount > 0) {
            tmpNode = new YAHOO.widget.MenuNode({label: root_node.item(i).getElementsByTagName('name').item(0).firstChild.data, href: href_str }, node, false);
          } else {
            tmpNode = new YAHOO.widget.MenuNode({label: root_node.item(i).getElementsByTagName('name').item(0).firstChild.data }, node, false);
          }
        
          if (multiExpand == 1) {
            tmpNode.multiExpand = true;
          }
        
          tmpNode.data = new nodeData(id, path);
          if (childCount > 0) {
            tmpNode.setDynamicLoad(loadDataForNode);
          }
        }
    
        onCompleteCallback();

      } else {
        alert('There was a problem with the request.');
      }
    }
  }