function createXHR(){
	var resultat = null;
	try{ //For Mozilla, Opera...
		resultat = new XMLHttpRequest();
	}
	catch (Error){
		try{ //For browsers > IE 5.0
			resultat = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (Error){
			try{ //For IE 5.0
				resultat = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(Error){
				resultat = null;
			}
		}
	}
	return resultat;
}

function getByLetter(){
	objectXHR = new createXHR();
	objectXHR.open("get", "lib/phpFunctions/getByLetter.php", true);
	objectXHR.onreadystatechange = actualiserPage;
	document.getElementById("chargeAjax").style.visibility="visible";
	document.getElementById("event").style.visibility="hidden";
	document.getElementById("anchor").style.visibility="hidden";
	document.getElementById("hotspotList").style.visibility="hidden";
	objectXHR.send(null);
}

function getByCity(){
	objectXHR = new createXHR();
	objectXHR.open("get", "lib/phpFunctions/getByCity.php", true);
	objectXHR.onreadystatechange = actualiserPage;
	document.getElementById("chargeAjax").style.visibility="visible";
	document.getElementById("event").style.visibility="hidden";
	document.getElementById("anchor").style.visibility="hidden";
	document.getElementById("hotspotList").style.visibility="hidden";
	objectXHR.send(null);
}

function actualiserPage(){
	if ( objectXHR.readyState == 4){
		if (objectXHR.status == 200){
			var newContainer = objectXHR.responseText;
			document.getElementById("container").innerHTML = newContainer;
			document.getElementById("chargeAjax").style.visibility="hidden";
			document.getElementById("anchor").style.visibility="visible";
			document.getElementById("hotspotList").style.visibility="visible";
		}
	}
}

function hello(){
	alert("test");
}