function getXHR()
{
	/*	Used to retrieve and XML HTTP Request object
		Output: an XMLHttpRequest object
	*/
	
	var XHR;
	
	// First determine user's browser
	if (window.XMLHttpRequest)	// Non-IE browser such as FireFox or Netscape
	{
		return new XMLHttpRequest();
	}
	else if (window.ActiveXObject)	// IE
	{
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	else
	{
		// Assume browser doesn't support AJAX technologies
	}
}