Layers

Hi, I have a swf movie with different layers. However at one stage i need one of the layers to be invisible. I tough the code should be something like thiis:

LayerName[color=navy]._visible[/color]=[color=navy]false[/color];

however this doesnot work. Do you have to give anither name and reference ot from it. In this case were do i insert this name.

Thanls for any sugestions!
Simboy