Here is their example showing how to declare private & public properties and functions. Everything is done as a self-executing anonymous function.

(function( skillet, $, undefined ) {
    //Private Property
    var isHot = true;

    //Public Property
    skillet.ingredient = "Bacon Strips";

    //Public Method
    skillet.fry = function() {
        var oliveOil;

        addItem( "\t\n Butter \n\t" );
        addItem( oliveOil );
        console.log( "Frying " + skillet.ingredient );
    };

    //Private Method
    function addItem( item ) {
        if ( item !== undefined ) {
            console.log( "Adding " + $.trim(item) );
        }
    }
}( window.skillet = window.skillet || {}, jQuery ));

//Adding new Functionality to the skillet
(function( skillet, $, undefined ) {
    //Private Property
    var amountOfGrease = "1 Cup";

    //Public Method
    skillet.toString = function() {
        console.log( skillet.quantity + " " +
                     skillet.ingredient + " & " +
                     amountOfGrease + " of Grease" );
        console.log( isHot ? "Hot" : "Cold" );
    };
}( window.skillet = window.skillet || {}, jQuery ));
 

MY DEMO:

/**
 * 公告推送JS
 * Created by 許暢 on 2015-05-29.
 */
(function(notice, $, undefined) {

/**
 * 公告推送初始化
 * 
 * @return {[type]} [description]
 */
notice.init = function() {
var intro = introJs();
//註冊退出事件
intro.onexit(function() {
notice.exitNotice();
});
//註冊步驟完成事件
intro.oncomplete(function() {
notice.stepComplete();
});
//註冊步驟改變事件
intro.onchange(function(targetElement) {
notice.stepChange(targetElement);
});
intro.setOptions({
steps: scope.steps,
nextLabel: "下一條",
prevLabel: "上一條",
skipLabel: "跳過",
doneLabel: "關閉"
});
intro.start();
for (var i = 0; i < scope.steps.length; i++) {
if (i > 0) {
$(scope.steps[i].element).hide();
}
};
//CAP工作臺容器
$(".workbench-container").hide();
};


/**
 * 退出公告
 * 
 * @return {[type]} [description]
 */
notice.exitNotice = function() {
var closedNoticeIds = [];
scope.allNoticeIds.forEach(function(item, index, array) {
if ($.inArray(item, scope.readNoticeIds) == -1 && item != scope.currentNoticeId) {
closedNoticeIds.push(item);
}
});


dwr.TOPEngine.setAsync(false);
CapNoticeAction.closeNotice(closedNoticeIds, scope.currentNoticeId, {
callback: function(result) {},
errorHandler: function(message, exception) {}
});
dwr.TOPEngine.setAsync(true);
//重新整理公告iframe
$('#mainIframe').attr('src', $('#mainIframe').attr('src'));


$("#noticeIntroduce").hide();
$(".workbench-container").show();
};


/**
 * 公告步驟完成
 * 
 * @return {[type]} [description]
 */
notice.stepComplete = function() {};


/**
 * 步驟改變事件
 * 
 * @param  {[type]} targetElement [description]
 * @return {[type]}               [description]
 */
notice.stepChange = function(targetElement) {
dwr.TOPEngine.setAsync(false);
CapNoticeAction.readNotice({
id: scope.currentNoticeId
}, {
callback: function(result) {
//不存在readNoticeIds陣列中則新增
if ($.inArray(scope.currentNoticeId, scope.readNoticeIds) == -1) {
scope.readNoticeIds.push(scope.currentNoticeId);
}
//下個公告為當前公告id
scope.currentNoticeId = targetElement.id;
},
errorHandler: function(message, exception) {
scope.currentNoticeId = targetElement.id;
}
});
dwr.TOPEngine.setAsync(true);


//前端下一步顯示處理
$("#" + targetElement.id).show();
scope.steps.forEach(function(item, index, array) {
if (item.element != ("#" + targetElement.id)) {
$(item.element).hide();
}
});


};
}(window.notice = window.notice || {}, jQuery));


var scope = null;
angular.module('noticeIntroduce', ["ngSanitize"]).controller('noticeIntroduceController', function($scope, $timeout) {
$scope.introduce = {};
$scope.readNoticeIds = []; //已閱的公告id
$scope.currentNoticeId = ""; //當前公告id
$scope.allNoticeIds = [];
$scope.ready = function() {
$scope.init();
scope = $scope;
};


/**
 * 頁面初始化
 * 
 * @return {[type]} [description]
 */
$scope.init = function() {
dwr.TOPEngine.setAsync(false);
CapNoticeAction.queryCurrentUserCanPushsNotice({
callback: function(result) {
var steps = [];
if (result && result.length > 0) {
result.forEach(function(item, index, array) {
//處理前端id不能為數字問題
item.id = "_" + item.id;
steps.push({
element: "#" + item.id,
intro: item.title
});
if (index == 0) {
$scope.currentNoticeId = item.id;
}
$scope.allNoticeIds.push(item.id);
});
} else {
$("#noticeIntroduce").hide();
}
$scope.steps = steps;
$scope.introduce.notices = result;
},
errorHandler: function(message, exception) {
$scope.introduce.notices = [];
}
});
dwr.TOPEngine.setAsync(true);
};
});


//jquery初始化公告推送資訊
$(function() {
if (scope.steps && scope.steps.length > 0) {
notice.init();
}
});