How do you make a script so you can put your cursor on and off a button and frame pop up and off?

So, I need help right now, because I don't know how to make a frame pop up, when you put your mouse over it. Could someone please tell me how, to make it so if you put your mouse on a button, a frame will pop up?? and when you take it off it'll remove it?

http://wiki.roblox.com/index.php/MouseEnter_(Event) http://wiki.roblox.com/index.php/MouseLeave_(Event) http://wiki.roblox.com/index.php/Visible_(Property)