[FX.php List] When did JavaScript start being enabled by default?

[Joel Shapiro]

Hi all

I want to use quite a bit of AJAX on a new project, but I want to let  
the client know that it will require JavaScript to be enabled on all  
users' browsers.  I know I can build ways for the site to deal with  
disabled JavaScript, but it's not a public website so it might not be  
worth my time if the user group can be fairly well controlled.  (This  
is not a critical project, though of course I'll take server-side  
precautions as necessary)

The client has said that they've got some computers onsite that are  
up to seven years old, and they're running Camino and Safari on  
them.  I'll give them a couple JavaScript sites for them to test on  
their older machines, but does anyone know when JavaScript started  
coming enabled by default on browsers?  It seems to me that by 2000  
JavaScript would have been enabled regularly.  Your thoughts?

TIA,
-Joel