Browser Object Model (BOM):
===========================
1) window
==========
Document
Global Variable is =
Local Variable is =
Object is =
==========================================
Document
==========================================
Document
2) Document
===========
3) screen
BOM Concepts
============================================================
4) History
===========
history.back()
history.forward()
history.go()
5) navigation
=============
navigation.language
6) location
7) console