/*
url-loading object and a request queue built on top of it
*/

/* namespacing object */
var net=new Object();

net.READY_STATE_UNINITIALIZED=0;
net.READY_STATE_LOADING=1;
net.READY_STATE_LOADED=2;
net.READY_STATE_INTERACTIVE=3;
net.READY_STATE_COMPLETE=4;


/*--- content loader object for cross-browser requests ---*/
net.ContentLoader=function(url,onload,onerror,method,params,contentType){
  this.req=null;
  this.onload=onload;
  this.onerror=(onerror) ? onerror : this.defaultError;
  this.loadXMLDoc(url,method,params,contentType);
}

net.ContentLoader.prototype.loadXMLDoc=function(url,method,params,contentType){
  if (!method){
    method="GET";
  }
  if (!contentType && method=="POST"){
    contentType='application/x-www-form-urlencoded';
  }
  if (window.XMLHttpRequest){
    this.req=new XMLHttpRequest();
  } else if (window.ActiveXObject){
    this.req=new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (this.req){
    try{
      var loader=this;
      this.req.onreadystatechange=function(){
        net.ContentLoader.onReadyState.call(loader);
      }
      this.req.open(method,url,true);
      if (contentType){
        this.req.setRequestHeader('Content-Type', contentType);
      }
      this.req.send(params);
    }catch (err){
      this.onerror.call(this);
    }
  }
}


net.ContentLoader.onReadyState=function(){
  var req=this.req;
  var ready=req.readyState;
  if (ready==net.READY_STATE_COMPLETE){
    var httpStatus=req.status;
    if (httpStatus==200 || httpStatus==0){
      this.onload.call(this);
    }else{
      this.onerror.call(this);
    }
  }
}

net.ContentLoader.prototype.defaultError=function(){
  alert("error fetching data!"
    +"\n\nreadyState:"+this.req.readyState
    +"\nstatus: "+this.req.status
    +"\nheaders: "+this.req.getAllResponseHeaders());
}

var xmlDoc;
      var xslDoc;
      var objOutput;
      function LoadXMLXSLTDoc(urlXML,urlXSL,elementID){
        xmlDoc=null;
        xslDoc=null;
        objOutput = document.getElementById(elementID);
        new net.ContentLoader(urlXML,onXMLLoad);
        new net.ContentLoader(urlXSL,onXSLLoad);
      }
      function onXMLLoad(){
        xmlDoc=this.req.responseXML;
        doXSLT();
      }
      function onXSLLoad(){
        xslDoc=this.req.responseXML;
        doXSLT();
      }

      function doXSLT(){
        if (xmlDoc==null || xslDoc==null){ return false; }
        if (window.ActiveXObject){
          objOutput.innerHTML=xmlDoc.transformNode(xslDoc);
        }
        else{
          var xsltProcessor = new XSLTProcessor();
          xsltProcessor.importStylesheet(xslDoc);
          var fragment =xsltProcessor.
            transformToFragment(
              xmlDoc,document);
          objOutput.innerHTML = "";
          objOutput.appendChild(fragment);
        }
      }