function GetRequestObject() {
	//If browser Mozilla/Firefox, create object for Mozilla/Firefox
	if(window.XMLHttpRequest) {
		return new 	XMLHttpRequest();
	} 
	//If browser Internet Explorer, create object for internet explorer
	else if (window.ActiveXObject) {
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	//undefined, probably this browser don't support ajax
	else {
		return null;
	}
}


/** XHConn - Simple XMLHTTP Interface - bfults@gmail.com - 2005-04-08        **
 ** Code licensed under Creative Commons Attribution-ShareAlike License      **
 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/
function XHConn() 	{
	var xmlhttp, bComplete = false;
	try { 
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 
	}
	catch (e) { 
		try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
		catch (e) { 
			try { xmlhttp = new XMLHttpRequest(); }
			catch (e) { xmlhttp = false; 
			}
		}
	}
  
	if (!xmlhttp) return null;
	this.connect = function(sURL, sMethod, sVars, fnDone)	{
		if (!xmlhttp) return false;
		
		bComplete = false;
		sMethod = sMethod.toUpperCase();
		try {
			if (sMethod == "GET")      {
				xmlhttp.open(sMethod, sURL+"?"+sVars, true);
				sVars = "";
			}
			else      {
			
				xmlhttp.open(sMethod, sURL, true);
				xmlhttp.setRequestHeader("Method", "POST " + sURL + " HTTP/1.1");
				xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			}
			xmlhttp.onreadystatechange = function()	{
				if (xmlhttp.readyState == 4 && !bComplete)        {
				  bComplete = true;
				  fnDone(xmlhttp);
				}
			};

			xmlhttp.send(sVars);
		}
		catch(z) { return false; }
		return true;
	};
	
	return this;
}


// doAJAXCall : Generic AJAX Handler, used with XHConn
// Author : Bryce Christensen (www.esonica.com)
// PageURL : the server side page we are calling
// ReqType : either POST or GET, typically POST
// PostStr : parameter passed in a query string format 'param1=foo&param2=bar'
// FunctionName : the JS function that will handle the response

var doAJAXCall = function (PageURL, ReqType, PostStr, FunctionName) {

	// create the new object for doing the XMLHTTP Request
	var myConn = new XHConn();

	// check if the browser supports it
	if (myConn)	{
	    
	    // XMLHTTPRequest is supported by the browser, continue with the request
	    myConn.connect('' + PageURL + '', '' + ReqType + '', '' + PostStr + '', FunctionName);    
	} 
	else {
	    // Not support by this browser, alert the user
	    alert("XMLHTTP not available. Try a newer/better browser, this application will not work!");   
	}
}