javascript 使用命名空间编程

var MyNameSpace = {};//also can use: new Object()
MyNameSpace.SubNameSpace = {}; //also can use: new Object()
MyNameSpace.SubNameSpace.People = function() { }
MyNameSpace.SubNameSpace.nameSpaceMethod = function(alertMsg) { alert(alertMsg); }

MyNameSpace.SubNameSpace.People.prototype = {
height: 168, //cm
weight: 60, //kg
sayWeight: function() { alert('My weight is ' + this.weight + 'kg.'); }
}

var man = new MyNameSpace.SubNameSpace.People();
man.sayWeight();
man.weight = 65;
man.sayWeight();
MyNameSpace.SubNameSpace.nameSpaceMethod('method under the namespace.');