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Javascript "Error: Object required"

With IE7 if you go here http://alturl.com/287f
then enter for example the values 11, 11 and 11 as "dimensioni"
this Javasscript error appears:
Line: 15
Char: 3
Error: Object required
Code: 0

If I open the source of the page I don't see anything that matters in line 15.

How can I know what file and line it's referring to? what debugging tool should I use?

Note: in Firefox with Firebug I don't see any Javascript error. I see it only in IE7

Chances are the error is on line 14 or sixteen - the notifier is notoriously errant ;-)

ASKER

here are the lines from 8 to 17:

<style type="text/css">

</style>

Still convinced that the Javascript error can be from line 14 to line 16? :)

I suspect that the error is in some third file (...js) called by this page but how can I find what is it?

SOLUTION

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Put

debugger;

on its own line in the .JS file and step through your code.

Or look in each external .JS file for lines 14-16 and see if you can figure it out from there, smarty=pants ;-)

SOLUTION

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ASKER CERTIFIED SOLUTION

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@bui_trung_hieu, no offense meant, but 4 comments ago, I said exactly that: #24181052 :)

@abel : sorry, I didn't see your answer when posting mine.

np, I see now that the time wasn't that far apart and I have it all the time myself as well ;)

ASKER

thanks abel
and thanks bui_trung_hieu for the fast "solution", that worked :-D

> thanks abel and thanks bui_trung_hieu for the fast "solution", that worked :-D

glad we could be of some help :)