JavaScriptの機能

・オブジェクト（関数）

・プロトタイプ

やり方①

function C(){　　–>Constracter definition

this.x = 0;

this.y = 0;

}

C.prototype.f = function(){　　–>Static member definition

return this.x * this.y;

};

ver c = newC();　　–>Intancing definition

やり方②

var C = function(){

}

やり方③

var C = {

x = 0,

y = 0,

f = function(){}

};

派生（継承）

var C2 = new ();

C2.prototype.hoge = function();

var C3 = new C2();