The cp.runJavascript needs another argument "_self", but it still will not work.
The advanced action "showMe" name only exists in the IDE, not in the HTML5 output. The only thing that exists in the code is all of the JavaScript or cpCommands that make up the advanced action, ie:
cp.show("something");
cp.runJavascript("someFunction()", "_self")
cp.jumpToNextSlide()
You are on track using the "oca" but the implementation is wrong. You need to find the element that has the specific "oca" property.
cp.runJavascript(cp.model.data.slideID.elementID.oca, "_self");
If you have a button say "cc_btn" that is set to display for the rest of the project, it would be:
cp.runJavascript(cp.model.data.cc_btn.oca, "_self");
It all depends on what is triggering the advanced action. You may need to first get the slide id, the once you have that you can iterate through it's "si" property to get the element and then the "oca" property.