var Ajax;

function GetAjaxHandle(){
	var handle=null;

	try{
		// Firefox, Opera 8.0+, Safari
		handle=new XMLHttpRequest();
	}
	catch (e){
		// Internet Explorer
		try{
			handle=new ActiveXObject("Msxml2.XMLHTTP");
		}	
		catch (e){
			handle=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	
	return handle;
}

function getNotifications(data){
	Ajax=GetAjaxHandle();
	if (Ajax == null){
		alert("Your browser does not support Ajax.");
		return;
	}
	
	var url="getNotifications.php";
	url=url+"?sid="+Math.random();
	Ajax.onreadystatechange=stateChanged;
	Ajax.open("GET",url,true);
	Ajax.send(null);
}
function getMessages(data){
	Ajax=GetAjaxHandle();
	if (Ajax == null){
		alert("Your browser does not support Ajax.");
		return;
	}
	
	var url="getMessages.php";
	url=url+"?s="+data;
	url=url+"&sid="+Math.random();
	Ajax.onreadystatechange=stateChanged;
	Ajax.open("GET",url,true);
	Ajax.send(null);
}

function stateChanged(id){
	if (Ajax.readyState==4 || Ajax.readyState=="complete"){ 

		document.getElementById('messages').innerHTML=Ajax.responseText;

	} 
}