Is there a way to mark a file or folder as "don't import"

I have some .js files that I don’t want Mono to try to compile. Every file added to the Assets folder gets immediately imported, if it’s not in Assets, it’s not copied when building the project. Is there a way to mark files or folders as “don’t import”?

Put them in a folder called WebPlayerTemplates:
http://docs.unity3d.com/Documentation/ScriptReference/index.Script_compilation_28Advanced29.html

Any files in this folder will not be compiled.