/* 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)
{
  var method = "GET";

  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("GET",url,true);
      this.req.send(null);
    }
    catch (err)
    {
      this.onerror.call(this);
    }
  }
}

net.ContentLoader.onReadyState=function()
{
  var req=this.req;
  var ready=req.readyState;
  try
  {
    var httpStatus=req.status;
  }
  catch(err)
  {
  }
  if (ready==net.READY_STATE_COMPLETE)
  {
    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());
}