//LOGIN & LOGOUT
function login(input) {
	if (document.getElementById("menuloginlogout").value == "") {
		return false;
	}

	if (window.XMLHttpRequest) {
		var xhr = new XMLHttpRequest();
	}
	else {
		var xhr = new ActiveXObject("Microsoft.XMLHTTP");
	}

	xhr.onreadystatechange = function() {
		if (xhr.readyState == 4) {
		  var login = xhr.responseText;
		  document.getElementById("menuloginlogout").innerHTML = login;
		}
		else {
			document.getElementById("menuloginlogout").innerHTML ='<img src="js/ajax-loader.gif"/>';
		}
	}

	var username=encodeURIComponent(document.getElementById("username").value)
	var password=encodeURIComponent(document.getElementById("password").value)
	var parameters="username="+username+"&password="+password

	xhr.open("POST", "login.php", true)
	xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
	xhr.send(parameters)

	document.getElementById("menuloginlogout").style.display='block';
}

function logout(input) {
	if (document.getElementById("menuloginlogout").value == "") {
		return false;
	}

	if (window.XMLHttpRequest) {
		var xhr = new XMLHttpRequest();
	}
	else {
		var xhr = new ActiveXObject("Microsoft.XMLHTTP");
	}

	xhr.onreadystatechange = function() {
		if (xhr.readyState == 4) {
		  var logout = xhr.responseText;
		  document.getElementById("menuloginlogout").innerHTML = logout;
		}
		else {
			document.getElementById("menuloginlogout").innerHTML ='<img src="js/ajax-loader.gif"/>';
		}
	}

	xhr.open("GET", "logout.php");
	xhr.send(null);

	document.getElementById("menuloginlogout").style.display='block';
}