function AJAX(url) {
	if (window.XMLHttpRequest) {
	xmlhttp=new XMLHttpRequest();
	} else {
	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	xmlhttp.open("GET",url,false);
	xmlhttp.send();
	return xmlhttp.responseText;
}
function AJAXxml(url) {
	if (window.XMLHttpRequest) {
	xmlhttp=new XMLHttpRequest();
	} else {
	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	xmlhttp.open("GET",url,false);
	xmlhttp.send();
	return xmlhttp.responseXML;
}
function loadPopup(url) {
	var popupContent = AJAX(url);
	var popupDiv = document.getElementById('popup');
	popupDiv.innerHTML = popupContent;
	popupDiv.style.display = 'block';
}
function showPopup(popupContent) {
	var popupDiv = document.getElementById('popup');
	popupDiv.innerHTML = popupContent;
	popupDiv.style.display = 'block';
}
function PopupAdvancementAppear() {
	document.getElementById('nav-popup-advancement').style.display = "block";
}
function PopupAdvancementAppear() {
	document.getElementById('nav-popup-advancement').style.display = "none";
}