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JavaScript floating objects

Nicholas Chase, Author, Web Site Developer
Nicholas Chase has been involved in Web site development for companies including Lucent Technologies, Sun Microsystems, Oracle Corporation, and the Tampa Bay Buccaneers. Nick has been a high school physics teacher, a low-level radioactive waste facility manager, an online science fiction magazine editor, a multimedia engineer, and an Oracle instructor. More recently, he was the Chief Technology Officer of Site Dynamics Interactive Communications in Clearwater, Florida. He is the author of three books on Web development, including Java and XML From Scratch (Que). He loves to hear from readers and can be reached at nicholas@nicholaschase.com.

Summary:  Have you ever seen content floating in the corner of your browser? Scroll the page, resize the window, and it still appears in that corner. This tutorial teaches you to create cross-browser floating content on a page, and even to reposition it.

Date:  20 Dec 2001
Level:  Introductory
PDF:  A4 and Letter (810 KB | 45 pages)Get Adobe® Reader®

Activity:  8279 views
Comments:  

Summary

Any HTML can be turned into a floating object by making it part of an identifiable div and positioning it via scripting. All you need to do is determine the size and scrolled offset of the window and dynamically place the floater at a set interval. The scripting necessary for this technique differs from browser to browser, but you can use browser detection techniques to give each browser its appropriate code.

Code that permits users of Internet Explorer 5.x to move the floater by checking their mouse clicks and creating a new offset to be used by the positioning routine can be added to the script.

This tutorial has offered techniques and code samples that demonstrate:

  • Creating content to float
  • Determining page size
  • Positioning content
  • Basic browser detection
  • Attaching functions to page events
  • Creating functions that are executed at regular time intervals

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static.content.url=http://www.ibm.com/developerworks/js/artrating/
SITE_ID=1
Zone=Web development
ArticleID=136470
TutorialTitle=JavaScript floating objects
publish-date=12202001
author1-email=
author1-email-cc=

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