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Chapter 2. Image Rollovers > Rollover Quirks

Rollover Quirks

Rollovers can be a very useful and exciting addition to your Web site; however, there are some quirks that you should keep in mind when using them. First, not everyone is going to be able to see your rollovers—anyone using a version of Netscape older than 3.0 or Internet Explorer 3.0 won't be able to see them. While this surely isn't a big enough deterrent to dissuade you from using rollovers, you should keep it in mind. It's not a good idea to have navigation that is only accessible through the use of a rollover; it's always good etiquette to include at least back-up text navigation for those with older browsers.

The following quirk rears its head in Netscape 3.0: When using images inside nested tables, if you have a table that is nested into another table, and an image is located in that nested table, the Java-Script engine will create two array entries for that single graphic. If the image were in a table that was nested inside two tables, then three entries would be created in the images array. This can lead to problems if you are referring to your images based on their location in the IMAGE array instead of by name.


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