Basic HTML version of Foils prepared 11 March 99

Foil 55 Use of Position Attributes in JavaScript

From Overview of JavaScript II -- From Cookies to Dynamical HTML CPS616 Technologies of the Information Age -- Spring Semester 99. by Geoffrey C. Fox (Tom Scavo)
Making dynamic pages with HTML and JavaScript requires two types of capabilities.
  • Identifying events of interest (the user interactions that will trigger dynamic structure) and processing
  • Dividing page up into identifiable components where we can separately:
    • move around in x,y position
    • move up and down a stack of pages (decide what's on top)
    • change content and style of components
These capabilities EXIST in current browsers but are incomplete and different
More powerful "standards" are part of W3C DOM1 and DOM2 and presumably these will be adopted
In the meantime we adopt strategy which is supported by current browsers and can evolve to W3C DOM1,2

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