Firefox Firebug and Jquery

[linderox]

I decided to try such amazing product as jquery, because it simple. I started with getting start from jquery.com. and the first example didn't work in my Firefox, but it's perfectly work on IE7. There was an error that: "$ is not defined"
I get a google, but it doesn't give me an answer. I just found that I'm not alone. how to solve it? (my firefox is 3.0.6 jquery 1.2.6 using from localhost)
P.S. anyother sites with jquery works well on firefox without any such errors in the firebug.

[omnicity]

Was that the only error?
My gut feeling is that either JQuery isn't loading, or that an init function is failing. It is rather unlikely that there is a formatting error, if it loads okay in other browsers.

Might be better to look for a JQuery specific support forum - very few JavaScript experts use such frameworks in preference to their own libraries.