2 actions in 1 button?

Hey im new at Edge Animation, but i made a button that triggers a menu to appears, but i have 2 questions:

1. How can I make my button make the menu appear after 1 click, but when the menu is shown, and you then click the button again, it will play reverse?

2. How do i make the symbol i am using as button so when i hover my mouse over it, the cursor changes as if i was a link?

Thanks!