JavaScript Date prototype 属性

实例

创建一个新的日期对象方法：

 Date.prototype.myMet=function()
{
if (this.getMonth()==0){this.myProp="January"};
if (this.getMonth()==1){this.myProp="February"};
if (this.getMonth()==2){this.myProp="March"};
if (this.getMonth()==3){this.myProp="April"};
if (this.getMonth()==4){this.myProp="May"};
if (this.getMonth()==5){this.myProp="June"};
if (this.getMonth()==6){this.myProp="July"};
if (this.getMonth()==7){this.myProp="August"};
if (this.getMonth()==8){this.myProp="Spetember"};
if (this.getMonth()==9){this.myProp="October"};
if (this.getMonth()==10){this.myProp="November"};
if (this.getMonth()==11){this.myProp="December"};
} 

创建一个 Date 对象,调用对象的 myMet 方法:

 var d = new Date();
 d.myMet();
 var monthname = d.myProp; 

monthname 输出结果：

 var d = new Date(); d.myMet(); document.write(d.myProp);