disable autocomplete when user login to APM logon page

This issue, as you probably saw, is kind of a cat-and-mouse game between web app operators and browser makers. Web app operators often want to block this autocomplete and browser operators always want it to work regardless of what the site wants. See this Stack Overflow thread for a discussion on this topic:

https://stackoverflow.com/questions/12374442/chrome-ignores-autocomplete-off

In the past I've had luck moving the forms around, adding hidden inputs between Login and Password, and other weird tricks to confuse the browser, but ultimately the most secure solution to avoid auto-fill-in is to use some kind of OTP or smart card login.