function GetXmlHttpObject()
{
	
	var xmlHttp = null;
	
	try
	{
		// Firefox, opera 8.0+ og safari
		xmlHttp = new XMLHttpRequest();
	}
	
	catch (e)
	{
		
		// Internet explorer
		try
		{
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		}
		
		catch (e)
		{
			xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
		
	}
	
	return xmlHttp;
	
}

// Athuga hvort innerHTML í DIV sé breytt
function stateChanged(){ if(xmlHttp.readyState == 4){ document.getElementById('data').innerHTML = xmlHttp.responseText; } }

// Ef bæta við pizzu af matseðli
function updateData(){
	
	window.setTimeout(updateData,500000);
	xmlHttp = GetXmlHttpObject();
	
	if(xmlHttp == null){
		alert("Vafrinn þinn styður ekki AJAX");
		return;
	}
	
	var url = "data.ajax.php";
	xmlHttp.onreadystatechange = stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

//updateData();