Controlling main timeline from outside the flash movie

[FONT=Times New Roman][SIZE=3]Hi, everybody, [/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]I have a problem I’m going to face very soon in my project. Does anybody have a simple solution how to control a flash movie’s _root from another flash movie – one of them is a banner and another is the flash site. They’re both in the same HTML document. When banner is clicked, the flash site should go and play frame 3 on main timeline.[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]I’m just about learning the basics of action script and this is way too difficult to me to figure out.[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]Can anybody help or give some ideas?[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3] [/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]Thanx![/SIZE][/FONT]