Sharing Functions between Frames
One common frame layout uses a permanent navigation frame and a content frame that might display a variety of different pages. Once again, it makes sense to put the call to the external JavaScript file into the page that’s always present (the frameset page) instead of duplicating it for every possible content page. In Figure 5.10, we use this capability to have many pages share an identical function that returns a random banner image. Script 5.12 loads the pages into the frameset.
Figure 5.10. The information in the right, or content, frame is created by code called from the frameset.
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