What is the best way to Debug Javascript?

I tend to use alert boxes for variable values, but this is time consuming.

Are there any other better ways?

Picco

www.crmpicco.co.uk

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Best way is to download the Javascript Debugger extension in firefox.

http://www.hacksrus.com/~ginda/venkman/

There is also an I.E. equivalent (not sure how you get that one ).

i was meaning just programaticaly? without a debugging program? seems awkward to use that Venkman, cant figure it out

www.crmpicco.co.uk

that Venkman debugger comes with FF, its in the tools menu.
it doesnt seem to easy to use, i loaded my script into the pane on the right - do i then run it?

www.crmpicco.co.uk

The Venkman thing can be a little difficult to use because you don't run the code like you would with a traditional debugger.

What you need to do is select your page and function from the left hand pane which will then load into the right hand pane, stick in a break point by clicking in the margin at the line you want to break at. Then go back to the browser and press refresh.

But if you want to do it without a debugger then alerts are best (not idea). You would need to maybe have some sort of debugging function in Javascript to format output etc etc.

But the debugger is more than good enough.

My favorite is 1st JavaScript Editor http://yaldex.com/JSFactory_Pro.htm.
1st JavaScript Editor Pro is advanced JavaScript Editor, Validator and Debugger for beginners and professionals!