December 2002
Intermediate to advanced
745 pages
17h 26m
English
book
Oracle® Web Application Programming for PL/SQL® Developers
by Susan Boardman, Melanie Caffrey, Solomon Morse, Benjamin Rosenzweig
Content preview from Oracle® Web Application Programming for PL/SQL® Developers
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Unit 13.3. JavaScript and Images
There are many ways that JavaScript can manipulate images. This section covers the popular use of Rollover buttons and an image list.
JavaScript Rollover
A JavaScript Rollover refers to what happens when you move or “roll” the mouse over a specific area on a page. One of the most common kinds of rollover is a clickable button that changes its appearance when the mouse is moved over it. In reality, one image is being swapped very quickly for another image. This is a popular element in Web pages because it focuses attention on the spot where the user has placed the mouse. When the image changes it also gives the user a sense that this button will cause an event to occur. Without this functionality in place, clickable ...