the way javascript create objects

//建立一個對象。//第一種，直接建立執行個體

1 var dada = new Object();2 dada.job = "worker";3 dada.married = true;

 //第二種//替代文法（使用對象 literals）

1 var james = {2     // add properties to this object!3     job : "programmer",4     married : false    5 };

//第三種

//使用物件建構器

 1 //function star (name,age,area) { 2     var star = function(name,age,area) { 3     //var a = function star (name,age,area) { 4         //上面的語句相當於var star = function(name,age,area) { 5         //也可以是var a = function star (name,age,area) {,但是這樣的話下面建立新對象執行個體的時候就要用a 6         this.name = name; 7         this.age = age; 8         this.area = area; 9         this.birthday = function (){10             //return 2013 - this.age;11             //this.birth = 2013;12             this.birthday =2013- this.age;13         };14     }

//一旦您有了物件建構器，就可以建立新的對象執行個體

 1 var prince = new star("yujianqi",26,"zhejiang"); 2     //var prince = new a("yujianqi",26,"zhejiang"); 3     prince.birthday(); 4     pname = "my name is" + "" + prince.name +", and my birthday is" + "" +prince.birthday +"."; 5     alert(pname); 6     var baby = new star("baby",5,"beijing"); 7     //您可以通過為對象賦值，向已有對象添加新屬性 8     baby.married = true; 9     baby.birthday();

//JavaScript for...in 語句迴圈遍曆對象的屬性。注釋：for...in 迴圈中的代碼塊將針對每個屬性執行一次。

1 for(a in baby){2         //alert(baby[a]);3         //alert(a);4     }