JavaScript Debugging - How?

[Mike Copeland]

I have a code page that has a few JavaScript functions (full
disclosure: I cannibalized it from code I got on Google, so I'm not sure
it's right...), and the page acts differently when I use IE7 from my IDE
(HTML-Kit) and from my Web site. Specifically, when I use IE7 loading
it from my Web host everything seems fine: it works as expected and
there are no "errors".
However, when I look at it via HTML-Kit the JavaScript doesn't work
(the only displayed is my default image) and I get a little "blip" sound
as the page loads.
I assume I have some error, one which produces different behavior in
the 2 environments (true?). I don't have the faintest idea how I'd
debug this problem, as I don't know how to test/debug JavaScript beyond
inserting "alerts" here and there. There must be _some_ mechanism
that's used to trace and uncover JavaScript errors, right?
Please advise. TIA

http://midtownmuseumdistrict.org/Businesses03.html

 

[Evertjan.]

Mike Copeland wrote on 04 aug 2009 in comp.lang.javascript:

I assume I have some error, one which produces different behavior in
the 2 environments (true?). I don't have the faintest idea how I'd
debug this problem, as I don't know how to test/debug JavaScript beyond
inserting "alerts" here and there. There must be _some_ mechanism
that's used to trace and uncover JavaScript errors, right?

Debugging large code from someone unknown is near impossible,
because:

1 You do not know what the designer ment it to do.

2 the designer did not knoew what you want it to do.

There are two viable options:

1 Build your own code and page

2 Hire or otherwise induce someone else to do that.

http://midtownmuseumdistrict.org/Businesses03.html

No, I am not going debug "your" code.