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)
1 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
2 These capabilities EXIST in current browsers but are incomplete and different
3 More powerful "standards" are part of W3C DOM1 and DOM2 and presumably these will be adopted
4 In the meantime we adopt strategy which is supported by current browsers and can evolve to W3C DOM1,2
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