With the __proto__ property in Netscape, you can explicitly initialize the prototype inheritance chain in your own custom constructors.

Warnings:

• It is unclear whether this property will be added to the ECMA standard. For now it is only available in Netscape.

Example code:

   // Create a cuboid object

   var AAA = { length:100, width:200, height:300 };

   // Create a cuboid that shares the height value

   var BBB = { length:50, width:100, __proto__:AAA };