Using hyperlink to toggle layer visibility?

Question

Okay, I've got a few threads going in other forums on this, and I'm getting a little frustrated with retyping it all, so I'm going to try to be brief... if you have any questions on what I'm trying to do, sorry for being vague, just ask and I'll try to clarify (I know, I hate posts that don't give enough info to work from).
OKay... I work with surveillance systems, and for one customer, I'm taking existing PDFs they have of site floorplans, loading them into Ilustrator CS5, adding icons and text showing camera locations and fields-of-view, then exporting to PDF, loading that into Acrobat Pro X, and adding a hyperlink to each camera icon that when clicked, will open a window with a still capture from that camera, so they can see what the view is "supposed" to look like.
This works fairly well, and the client is happy with it... there's just one annoyance: every click produces a dialog box warning about opening an external program, and in newer versions of Reader, there's no "Don't display this again" checkbox.  A way around this would be great, but I had a better idea:
I'm already creating layers in Illustrator: one for the floor plan, a second for the camera icons, a third for the text, and a fourth blank one so I can "swap out" the underlying floor/camera info without losing the hyperlinks (anywhere from 16 to 30, depending on the site).
I had the idea that what I could do, is add a separate layer for each camera's sample image, which would allow me to add the image directly to the document, and have it just appear over the floor plan, rather than loading in a separate app.  Then I could have the image layers start out invisible, and toggle the visibility by clicking the camera icon.
So I found this article that describes changing layer visibility from a hyperlink: http://help.adobe.com/en_US/Acrobat/9.0/Professional/WS58a04a822e3e50102bd615109794195ff-7 c5b.w.html
It... sort of works.  I can create a link that will show a hidden layer... but not re-hide it.  I created a separate link that would hide it... but not show it.  Not really suitable - I'd like to have the same link toggle the layer on/off (heck, it would pretty much have to, or you KNOW the end users will get confused). 
And the whole process seems a little clunky, at least from the above instructions.  Is there a better way to do this in Acrobat X?  Maybe a way to do it all within Illustrator?  Hope I'm clear enough about what I'm trying to achieve.
If all else fails, is there a way to get rid of the $&^@*#!!! external program warning popup??
Thanks, all!

Answer 1

Forget that help page example, it's only practicable if you're setting a very simple pattern of layers.
Instead, you should look at the JavaScript commands to control the visibility of individual layers, referencing them by their stacking order or name.
For example this snippet will turn on the layer called "camera1":
var ocgArray = this.getOCGs();
for (var i=0; i < ocgArray.length; i++) {
  if (ocgArray[i].name=="camera1") ocgArray[i].state = true;
You can easily extend this idea by creating a document-level function in the PDF, and calling that function from your links. For example if all your camera layers are named "camera1","camera2", etc. and you have a doc-level function like this:
function showCamLayer(theName) {
  var ocgArray = this.getOCGs();
  for (var i=0; i < ocgArray.length; i++) {
    if (ocgArray[i].name.substr(0,6) == "camera") ocgArray[i].state = false;
    if (ocgArray[i].name == theName) ocgArray[i].state = true;
then you can set your links to "run a JavaScript" and enter a single-line command such as showCamLayer("camera4")