Javascript, pop up window , error

when i try to use either of the tutorials on making a pop up window, i get this error message:

Safari can’t run the script “Launch(‘http://www.kirupa.com/kirupa.htm’)” because Safari doesn’t allow JavaScript to be used in this way.

I am using a mac (hence Safari) and i work in an industry where mac is the more common computer, so i want to make sure my site is mac compatable.

i’ve never run into this before, help?

g