Math class....available everywhere??? (scope)

[SamuraiDave]

I want to create a Class containing functions (similar to the Math class).
Also, like the Math class, I want it to be available everywhere.

For example, if I type

Math.floor(myNumber);

It works, no matter where I am in my code.

How can I make a class which has this ability?
I want to be able to type

MyMathClass.functionName();

and have it work, wherever I am in my code.

Is that possible??

Please help!
Cheers,
David