I want to have some control buttons above my Carousels that can remove
all the carousel items and replace them with new ones, change the size
and the visibilityNum.

I can see how to do all these things when I load the page initially,
but I don't know how to reference and change them later on.

For example, if I insert an HTML button on the page that says
onclick="carousel.removeItem(0)" I get a javascript error saying what
the heck is a carousel?

I realize that the carousel I want is contained in a div called
Container. But I still can't figure out a way to make something like
this work:
"document.getElementById('container').carousel.removeItem(0)". Again,
it says thet carousel is undefined.

Can you offer some guidance? thanks!