I just found a great and simple solution From blog.grio.com
function showNotificationBar(message, duration, bgColor, txtColor, height) {
/*set default values*/
duration = typeof duration !== 'undefined' ? duration : 1500;
bgColor = typeof bgColor !== 'undefined' ? bgColor : "#F4E0E1";
txtColor = typeof txtColor !== 'undefined' ? txtColor : "#A42732";
height = typeof height !== 'undefined' ? height : 40;
/*create the notification bar div if it doesn't exist*/
if ($('#notification-bar').size() == 0) {
var HTMLmessage = "<div class='notification-message' style='text-align:center; line-height: " + height + "px;'> " + message + " </div>";
$('body').prepend("<div id='notification-bar' style='display:none; width:100%; height:" + height + "px; background-color: " + bgColor + "; position: fixed; z-index: 100; color: " + txtColor + ";border-bottom: 1px solid " + txtColor + ";'>" + HTMLmessage + "</div>");
}
/*animate the bar*/
$('#notification-bar').slideDown(function() {
setTimeout(function() {
$('#notification-bar').slideUp(function() {});
}, duration);
});
}