Where is the JavaScript of the "Add New Option" Button?

Question

I'm talking about the page at admin -> catalog -> manage products -> any product -> custom options tab. I customized this page and added a new button which I basically want to act similarly. Presumably it is done via JavaScript, but it isn't clear to me where this functionality is defined.

A pointer in the right direction would be greatly appreciated.

Answer 1

Take a look at the file app/design/adminhtml/default/default/template/catalog/product/edit/options/option.phtml.
I think that one contains the js for the custom options.
Look specially at the function productOption.add. That's the one that adds a new option.
The add event is binded to the add button through this

if($('<?php echo $this->getAddButtonId() ?>')){
    Event.observe('<?php echo $this->getAddButtonId() ?>', 'click', productOption.add.bind(productOption));
}