JavaScript 对象的3种基本构造法

//第一种构造法：new Object
var a = new Object();
a.x = 1, a.y = 2;

//第二种构造法：对象直接量（是不是就是json？）
var b = {x:1, y:2}
或
var b = {};
b.x = 1;
b.x = 2;

//第三种构造法：定义类型
function Point(x,y){
    this.x = x;
    this.y = y;
}
var p = new Point(1, 2);

以上摘自《JavaScript王者归来》

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以下内容转自http://www.cnblogs.com/huazai/archive/2009/05/14/1457145.html
 

//1.对象复制
   emptyObject = new Object();
   company.apply = function(o, c,)
    {

          if(o && c && typeof c == 'object')

         {
              for(var p in c)

             {
                o[p] = c[p];
             }
         }
         return o;
   };
   emptyObject = Ext.apply(emptyObject,company);

//2.对象复制（函数方式）
   var copyOO = new Function();
   copyOO.prototype = company;

   var newcopyOO = new copyOO();