var Notification = window.Notification || window.mozNotification || window.webkitNotification;
var enabledNotifications,
    grantedPermission;

function askPermission () {
    Notification.requestPermission(function (permission) {
        // console.log(permission);
	if (permission == "granted") {
            grantedPermission = true;
        }
    else {
        grantedPermission = false;
    }
    });
}

function toggleNotifications() {
    if (enabledNotifications === true) {
        enabledNotifications = false;
    } else if (!enabledNotifications && grantedPermission === true){
        enabledNotifications = true;
    } else {
        askPermission();
    }
}


function showNotification(name, body, icon, timeout) {
    var instance = new Notification(
            name, {
                body: body,
                icon: icon
            }
    );

    instance.onclick = function () {
        // Something to do
    };
    instance.onerror = function () {
        // Something to do
    };
    instance.onshow = function () {
	setTimeout(function(){
	instance.close();
	}, timeout * 1000); 
    };
    instance.onclose = function () {
        // Something to do
    };
}