Changes

The window object is the top-level object of the object hierarchy and as such, whenever an object method or property is referenced in a script with the object name and dot prefix it is assumed by JavaScript to be a member of the window object. This means, for example, that when calling the window ''alert()'' method to display an alert dialog the ''window.'' prefix is not mandatory. Therefore the following method calls achive the same thing:

window.alert();

alert()

== Opening and Closing Browser Windows ==