생성자함수 Rectangle 선언

//생성자함수를 선언

function Rectangle(width,height) {

this.width=width;

this.height=height;

}

Rectangle.prototype.getArea=function(){

return this.width*this.height;

};

//변수를 선언

var rectangle =new Rectangle(5,7);

//출력

alert('AREA:'+rectangle.getArea());