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;
}

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();
		request.open( this.method, this.url, true );
		request.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded; charset=ISO-8859-1');
		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 ) {
			if ( this.isSuccess(request) )
			this.component.ajaxUpdate(request);
			else
			this.component.handleError(request);
		}
	},

	isSuccess: function(request) {
		return  request.status == 0
		|| (request.status >= 200 && request.status < 300);
	}

};