function Requester() {
	this.action = null;
	this.XML = null;
	this.commInterface = null;
	this.targetId = null
	// Initialise XMLHttpRequest object
	this.resetXMLHR();
	return true;
}



//Check if the XMLHttpRequest object is available 
Requester.prototype.isAvailable = function() {
	return (this.commInterface == null) ? false : true;
}

// Execute the action which has been associated with the completion of this object
Requester.prototype.executeAction = function() {
	// If XMLHR object has finished retrieving the data

	if (this.commInterface.readyState == 4)	{
		// If the data was retrieved successfully
		try	{
			if (this.commInterface.status == 200)	{
				this.responseText = this.commInterface.requestXML;
				this.action();
					
			}
			// IE returns status = 0 on some occasions, so ignore
			else if (this.commInterface.status != 0){
				alert("There was an error while retrieving the URL: " + this.commInterface.statusText);
			}
		}
		catch (error){}
	}
	return true;
}

// Return responseText 
Requester.prototype.getText = function() {
	return this.commInterface.responseText;
}


// Return responseXML 
Requester.prototype.getXML = function() {
	return this.commInterface.responseXML;
}

/**
 * Initialise XMLHR object and load URL 
 * @param string url 			= the page to request
 * @param string params			= any get parameters to be appended to the url
 */
Requester.prototype.loadURL = function(URL, params) {
	this.resetXMLHR();
	this.commInterface.open("GET", URL + "?" + params);
	this.commInterface.setRequestHeader("Content-Type", "text/html; charset=ISO-8859-1");
	this.commInterface.setRequestHeader('Accept-Charset','ISO-8859-1')
	this.commInterface.send(null);
	return true;
}

// Turn off existing connections and create a new XMLHR object 
Requester.prototype.resetXMLHR = function() {
	var self = this;

	if (this.commInterface != null && this.commInterface.readyState != 0 && this.commInterface.readyState != 4)	{
		this.commInterface.abort();
	}

	try	{
		this.commInterface = new XMLHttpRequest();
	}
	catch (error) {
		try {
			this.commInterface = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (error) {
			return false;
		}
	}

	this.commInterface.onreadystatechange = function()	{
		self.executeAction();
		return true;
	};
	return true;
}

// Assign the function which will be executed once the XMLHR object finishes retrieving data 
Requester.prototype.setAction = function(actionFunction,part) {
	this.action = actionFunction;
	return true;
}