Provide better example for private properties.

[LukeAskew]

"protected" varaibles.

Protect the prototype.

[mcgaryes]

// bad var that = new Object(); that._property = "Nancy";

// good var Test = function(){ this._privateVar = "test";
};

Test.prototype = { funx:function(){ this._privateVar = "foo"; }
};

// bad var test = new Test(); test._privateVar = "test";