Does the BlackBerry OS 4.x support Javascript?

When I run my web app in the BlackBerry emulat开发者_开发问答or 8320 I get an error about javascript not enabled. Does BlackBerry OS 4.x support javascript?

" the requested action could not be performed. Java script is not enabled on this hand held".

application -> browser -> options -> configuration, turn on javascript from there. It may not be enabled by default on the simulator.

I don't believe that it is enabled by default on phones, but it may be different now.

on browser version 4.5 and prior, there is no dynamic javascript.

There's a link to AJAX support on BB