javascript and error control

[Mariano]

Someone know an editor with good error control on Javascript code, or
plugin for firefox able to reveal the errors???
Neither Netbeans nor Firefox help me as I wish. Any suggest'????

 

[David Mark]

Someone know an editor with good error control on Javascript code, or
plugin for firefox able to reveal the errors???
Firebug.

Neither Netbeans nor Firefox help me as I wish. Any suggest'????

 

[Mariano]

Firebug.

I've installed it, and problem was solved in 2 minutes. Ty.