JavaScript testing

[MacDonaldsd]

Maybe I have overlooked something really simple but what application can I use to test my javascript code for a basic html page

 

[Mydriasis]

I dunno, maybe your web browser???

 

[MacDonaldsd]

I mean to find the errors in the code, so for not making this clear

 

[plinden]

Firefox - Tools/Javascript Console (or Error console in 2.0), plus a number of extensions like Firebug or Web Developer.
IE - script debugger
Opera - Tools/Advanced/Error console
Safari - I can't remember, I'm not at my Mac, but there's a debug console if you enable debugging.