var mySingleton = {
property1: "something",
property2: "something else",
method1: function () {
  console.log('hello world');
}};

 var mySingleton = function () {
  /* 这里声明私有变量和方法 */
  var privateVariable = 'something private';
  function showPrivate() {
    console.log(privateVariable);
  }
  /* 公有变量和方法（可以访问私有变量和方法） */
  return {
    publicMethod: function () {
      showPrivate();
    },
    publicVar: 'the public can see this!'
  };
};
var single = mySingleton();
single.publicMethod(); // 输出 'something private'
console.log(single.publicVar); // 输出 'the public can see this!'

var Singleton = (function () {
  var instantiated;
  function init() {
    /*这里定义单例代码*/
    return {
      publicMethod: function () {
        console.log('hello world');
      },
      publicProperty: 'test'
    };
  }
  return {
    getInstance: function () {
      if (!instantiated) {
        instantiated = init();
      }
      return instantiated;
    }
  };
})();
/*调用公有的方法来获取实例:*/
Singleton.getInstance().publicMethod();

function A( name ){
       this.name = name;
    }
    function ObjectFactory(){
       var obj = {},
           Constructor = Array.prototype.shift.call( arguments );
obj.__proto__ = typeof Constructor .prototype === 'number' ? Object.prototype
: Constructor .prototype;
       var ret = Constructor.apply( obj, arguments );
       return typeof ret === 'object' ? ret : obj;
    }
    var a = ObjectFactory( A, 'svenzeng' );
    alert ( a.name ); //svenzeng

  function selectScore( name, id, course_id ){
  // arguments 姓名 学号 课程id
  ...
}

[
  { name: 'lily', studentID: '0911' },
  { name: 'suny', studentID: '0912' },
  ...
]

function selectEnglishScore( stutentObj ){
  selectScore( stutentObj.name, stutentObj.studentID , 101);
}

$id = function( id ){
 return jQuery( '#' + id )[0];
}

var getName = function(){
 return ''svenzeng"
}
var getSex = function(){
  return 'man'
}

var getUserInfo = function(){
 var info = a() + b();
 return info;
}

var getNameAndSex = function(){
 return 'svenzeng" + "man";
}

var stopEvent = function( e ){  //同时阻止事件默认行为和冒泡
 e.stopPropagation();
 e.preventDefault();
}