module-pattern

var myModule = (function() {
    // private attr
    var _priVar = 10;

    // private function
    var _priMethod = function() { return "foo"; }

    return {
        // public attr
        pubVar: 10,
        // private function
        pubMethod: function() { return "bar"; },
        // access to private method and variable
    getData: function() { return _priMethod() + _priVar}
    }
})();   // get the anonymous function to execute and return

MyModule.getData();