Click image to start "billboard" rotate.

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• Automatic “billboard” version (above) uses <A href= "JavaScript: setTimeout ('rotateBB()', BBSpeed); jumpBB()"> <img NAME= "billboard" ...> </A> to rotate images and alter status line message.
• In “manual” version (to the left), clicking <A href= "JavaScript: chgSlide(1)"> Next </A> starts sequence over at first image after last slide. It works OK in Internet Explorer, but TRIPOD's stuff stuck right into HEAD and BODY tags of hosted sites screws it up in Netscape Navigator 4.

The 3rd edition of JavaScript Unleashed (Chap 21) noted that <FORM> TEXT object </FORM> was used for “scrolling marquees.” (NN4 supported <iLayer> but did not support <DIV>, <iFrame> or <Marquee> tags. Embedding <layer> inside <iLayer> was an alternative to <Form>. Now, NN6+ no longer supports <iLayer> and still seems to have bugs with <DIV>. What to do?)

JavaScript Unleashed's section on “billboards” noted four steps: (1) Create image placeholder on Web page. (2) Define array to hold images (example used primary and transitional image arrays). (3) Develop JavaScript routine to manage image presentation. (4) Associate JavaScript function as an event handler of Window's onLoad event.

Helpful “billboard” JavaScript examples were found at http://www.ipac.caltech.edu/2mass, http://www.webreference.com/javascript/960923/part02.html, and ...