There are no official standards for the Browser Object Model (BOM).
The window object is supported by all browsers. It represents the browser's window.
Global variables are properties of the window object.
Global functions are methods of the window object.
Even the document object (of the HTML DOM) is a property of the window object:
is the same as:
Three different properties can be used to determine the size of the browser window (the browser viewport, NOT including toolbars and scrollbars).
For Internet Explorer, Chrome, Firefox, Opera, and Safari:
For Internet Explorer 8, 7, 6, 5:
The example displays the browser window's height and width: (NOT including toolbars/scrollbars)
Some other methods: