JavaScript では、さまざまな方法でオブジェクトを作成できます。
// creates an object which makes the Object, prototype of data.
var data1 = new Object();
// Object literal notation; Object still is the prototype of data2.
var data2 = {};
// anotherObject is now the prototype of data3.
var data3 = Object.create(anotherObject);
/* data3 is an object which can be verified bye typeof operator,
however, it now has no prototype and you can
build everything from scratch. */
var data3 = Object.create(null);
Object.create(null)
しかし、IE のどのバージョンが最後のメソッド、つまりメソッドをサポートしているのかわかりません。