Adobe 23101335 User Guide - Page 302
Selecting an image map type (ImageReady), Working with rollovers (ImageReady), About rollovers
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292 CHAPTER 10 Designing Web Pages • _top to replace the entire browser window with the linked file, removing all current frames. Note: For more information on frames, see an HTML reference (either printed or on the Web). 4 In the Image Map palette, enter text for an Alt tag in the Alt text box. The Alt text appears in place of the image map area in nongraphical browsers. In most browsers, it also appears if the user positions the mouse over the image map area. Selecting an image map type (ImageReady) ImageReady can create client-side and server-side image maps. In client-side image maps, the links are interpreted by the browser itself. In server-side image maps, the links are interpreted by the server. Because client-side image maps don't need to contact the server to function, they are often significantly faster to navigate. By default, ImageReady saves image maps as client-side image maps. Important: Server-side image maps do not work in images that have multiple slices. You select an image map type in the Output Settings dialog box. (See "Setting HTML output options" on page 349.) If you select a server-side image map, ImageReady generates a separate map file based on the server option you select. However, you'll need to update the path to the map file in your HTML file. Working with rollovers (ImageReady) You use the Rollover palette, in conjunction with the Layers palette, to add rollover effects to a Web page. You can display an animation as a rollover state, or you can create secondary rollovers in which moving a mouse over one area causes an image change in another area. ImageReady adds JavaScript code to the resulting HTML file to specify rollover states. Note: When working with rollovers, it is important to preview images in a Web browser to ensure your document will function correctly for Web users. Also remember that image appearance will vary on different operating systems. About rollovers A rollover is a Web effect in which different states of an image appear when a viewer performs a mouse action-such as rolling or clicking- over an area of the Web page. A state is defined by a specific configuration of the Layers palette, including layer location, styles, and other formatting options. You use a slice or image map area to define the active area for a rollover. By default, every slice or image map area has one state-the Normal state. (The Normal state corresponds to the appearance of an image when it is first loaded into a Web browser and no rollover effects have occurred.) When you add a new state to the rollover, you capture a snapshot of the slice or image map area