/* 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,on_load,on_error,method,params,contentType){

this.req=null;

this.on_load=on_load;

this.on_error=(on_error) ? on_error : 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)

{

//add try catch;

try {

this.req = new ActiveXObject("Msxml2.XMLHTTP");

}catch (e1){

try {

this.req = new ActiveXObject("Microsoft.XMLHTTP");     

} catch (e2){

}

}

//

//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.on_error.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.on_load.call(this);

}else{

this.on_error.call(this);

}

}

}

net.ContentLoader.prototype.defaultError=function(){

alert("error fetching data!"

+"\n\nreadyState:"+this.req.readyState

+"\nstatus: "+this.req.status

+"\nheaders: "+this.req.getAllResponseHeaders());

}