There are some JavaScript functions used by the standard Salesforce pages that would be useful outside of the Standard pages. For example, the Account page has a "Copy Billing Address to Shipping Address" link that calls a copyAddr JS function. I'm building a custom VF page and would like to use that same functionality; however, I'd rather not build on top of something that is not relatively stable.
I can't find a Salesforce reference to standard Salesforce JavaScript functions. A standard JavaScript API seems like it would be useful.
Does anyone use these JS functions? If so, which ones?
Is there such a reference?