/* 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,div,onerror,method,params,contentType){
  this.req=null;
  this.onload=onload;
  this.div=div
  this.onerror=(onerror) ? onerror : this.defaultError;
  this.loadXMLDoc(url,method,params,contentType);
  this.parameter = null;
}

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());
}

function doAjax(url, callback, div) {
  loader = new net.ContentLoader(url,callback,div);
}
    
function el(id) {
  return document.getElementById(id);
}
    
function returnto() {
  el(this.div).innerHTML = this.req.responseText;
  el(this.div).style.display = "block";
}
function gotopage(page)
{
	window.location = (page)
}
function hide(div)
{
	document.getElementById(div).style.display = "none";
}