5.1 JavaScript Execution Environment

• The JavaScript Window object represents the window in which the browser displays documents
• The Window object provides the largest enclosing referencing environment for scripts
  • All global variables are properties of Window
• Implicitly defined Window properties:
  • document - a reference to the Document object that the window displays
  • frames - an array of references to the frames of the document
• Every Document object has:
  • forms - an array of references to the forms of the document
    • Each Form object has an elements array, which has references to the form's elements