With firefox w/firebug, can I type javascript into the browser and test things?
Can I also reference functions/objects from .js files references in the html?
With firefox w/firebug, can I type javascript into the browser and test things?
Can I also reference functions/objects from .js files references in the html?
Short answer: Yes, you can, by using the console.
Longer answer: Take a look at the What's new in Firebug 1.6 video, it gives an excellent demonstration on what you can do with the console, including auto-completion of the available variables.
Everything that's available globally in the current document is available to the console. So if you included jQuery on the current page, it'll be accessible from the console too.
yes, you can... while on firebug (1.6.1) click 5th button from the left, its like a bunch of lines, entitled show command line then you will see it.
as for your second question... u can use it as long as it is on the DOM otherwise goodluck to u :)