function login() {
	dojo.xhrPost( {
			url: '/login.php',
			form: dojo.byId('login_form'),
	        load: loginLoad,
			error: loginError
	});
}

function loginLoad(responseObject, ioArgs) {
    ro = dojo.fromJson(responseObject);
	if (ro.type === 'error') {
		alert(ro.message);
		return;
	}
	dojo.byId('loginbox').innerHTML = ro;
	window.location = '';
}

function loginError(){
	alert("An unknown error ocurred. Please try again.");
}

function logout(){
	dojo.xhrPost( {
			url: 'logout.php',
	        load: function(responseObject, ioArgs) 
			{
				window.location = '';
	        },
			error: function(a,b,c)
			{
				alert("An unknown error ocurred. Please try again.");
			}
	});
}