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;

net.ContentLoader = function( component, url, method, requestParams ) {
	this.component     = component;
	this.url           = url;
	this.requestParams = requestParams;
	this.method        = method;
	this.broken 	   = false;
}

net.ContentLoader.prototype = {
	getTransport: function() {
		var transport;
		if ( window.XMLHttpRequest ){
			transport = new XMLHttpRequest();
		}else if ( window.ActiveXObject ) {
			try {
				transport = new ActiveXObject('Msxml2.XMLHTTP');
			}
			catch(err) {
				transport = new ActiveXObject('Microsoft.XMLHTTP');
			}
		}
		return transport;
	},

	sendRequest: function() {

		//if ( window.netscape && window.netscape.security.PrivilegeManager.enablePrivilege)
		//   netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead');
		var requestParams = []
		for ( var i = 0 ; i < arguments.length ;  i++ ){
			requestParams.push(arguments[i]);
		}

		var oThis = this;
		var request = this.getTransport();
		if("post" == this.method){
			request.open( this.method, this.url, true );
			request.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded');
			request.onreadystatechange = function() { oThis.handleAjaxResponse(request) };
			request.send(this.queryString(requestParams) );
		}else{
			//			alert(this.url + '/' + this.queryString(requestParams));
			request.open( this.method, this.url + '/' + this.queryString(requestParams) + '.html', true );
			request.onreadystatechange = function() { oThis.handleAjaxResponse(request) };
			request.send(this.queryString(requestParams));
		}
	},

	queryString: function(args) {

		var requestParams = [];

		for ( var i = 0 ; i < this.requestParams.length ; i++ ){
			requestParams.push(this.requestParams[i]);
		}
		for ( var j = 0 ; j < args.length ; j++ ){
			requestParams.push(args[j]);
		}
		var queryString = "";
		if ( requestParams && requestParams.length > 0 ) {
			for ( var i = 0 ; i < requestParams.length ; i++ ){
				queryString += requestParams[i] + '/';
			}
			queryString = queryString.substring(0, queryString.length-1);
		}
		return queryString;
	},

	handleAjaxResponse: function(request) {
		if ( request.readyState == net.READY_STATE_COMPLETE && this.broken==false) {
			if ( this.isSuccess(request) ){
				this.component.ajaxUpdate(request);
			}else{
				this.component.handleError(request);
			}
		}
	},

	isSuccess: function(request) {
		if(typeof(request) != 'undefined'){
			return  request.status == 0
			|| (request.status >= 200 && request.status < 300);
		}else{
			return false;
		}
	},
	
	stop: function() {
		this.broken = true;
	}
};