Problem
1. What property has the content of an element?
2. What JavaScript variable is associated with the z-index property?
3. To move an element to the top of the display, do you set its z-index property to a large number or a small number?
4. What exactly is stored in the client X and client Y properties after a mouse click?
5. What exactly is stored in the screen X and screen Y properties after a mouse click?
6. Describe the parameters and actions of the set Timeout function.