Hi,
I have a pretty wierd situation. I have a javascript function that
runs when I submit a page. The onsubmit code does quite a bit - it
goes through a big textarea and replaces tabs with spaces,
inserts/removes line breaks...it uses regular expressions to convert
textarea content into somethign that can be sent to a mainframe
application.
Here's the problem: Sometimes special characters are pasted into the
text area from Word. Then, the submit code seems to go wrong - it
jumbles the content and some of the data is lost. I started adding
alerts in various places in the code to try and see where it was going
wrong. But it seems that by placing the alerts in the function, it
slows it down... and the error goes away!
It seems as though the code is going too fast and getting confused.
....but that doesn't really make sense to me. Has anyone ever
experienced illogical breaks like this? Any suggestions?
Thanks in advance!
7  1869 
John Angel wrote: I have a pretty wierd situation. I have a javascript function that
runs when I submit a page. The onsubmit code does quite a bit [...]
Here's the problem: Sometimes special characters are pasted into the
text area from Word. Then, the submit code seems to go wrong - it
jumbles the content and some of the data is lost. [...]
URL?
PointedEars
Thomas 'PointedEars' Lahn <Po*********@nurfuerspam.de> wrote in message news:<41**************@PointedEars.de>... John Angel wrote: I have a pretty wierd situation. I have a javascript function that
runs when I submit a page. The onsubmit code does quite a bit [...]
Here's the problem: Sometimes special characters are pasted into the
text area from Word. Then, the submit code seems to go wrong - it
jumbles the content and some of the data is lost. [...]
URL?
PointedEars
Unfortunately, this is part of a large, internal web application. I
guess I'm just wondering whether or not it's possible for javascript
(In IE6/xp) to get "ahead of itself" as it seems to.
Thomas 'PointedEars' Lahn <Po*********@nurfuerspam.de> wrote in message news:<41**************@PointedEars.de>... John Angel wrote: I have a pretty wierd situation. I have a javascript function that
runs when I submit a page. The onsubmit code does quite a bit [...]
Here's the problem: Sometimes special characters are pasted into the
text area from Word. Then, the submit code seems to go wrong - it
jumbles the content and some of the data is lost. [...]
URL?
PointedEars
Unfortunately, this is part of a large, internal web application. I
guess I'm just wondering whether or not it's possible for javascript
(In IE6/xp) to get "ahead of itself" as it seems to.
John Angel Unfortunately, this is part of a large, internal web application. I
guess I'm just wondering whether or not it's possible for javascript
(In IE6/xp) to get "ahead of itself" as it seems to.
When I drive my car too fast it rattles. Can you tell me what is wrong?
Oh, you want to see the car? Well, no, unfortunately you cant. It's locked
in the garage.
--
Cheers
Richard.
John Angel said: [...]
But it seems that by placing the alerts in the function, it
slows it down... and the error goes away!
Yes, that happens. Sometimes it seems to be a bug in the
browser that requires a change in state from code execution
to event processing before a change takes place. Other cases
can be explained by the fact that some method calls return
before the task (opening a window, for example) is completely
finished.
It's likely that at least one person reading this has
experienced your problem, but we would need to see an example.
We don't need to see the whole project.
Create a small test case that demonstrates the problem.
I'm particularly interested in seeing how you invoke the code
that's causing trouble.
John Angel wrote: Hi,
I have a pretty wierd situation. I have a javascript function that
runs when I submit a page. The onsubmit code does quite a bit - it
goes through a big textarea and replaces tabs with spaces,
inserts/removes line breaks...it uses regular expressions to convert
textarea content into somethign that can be sent to a mainframe
application.
Here's the problem: Sometimes special characters are pasted into the
text area from Word. Then, the submit code seems to go wrong - it
jumbles the content and some of the data is lost. I started adding
alerts in various places in the code to try and see where it was going
wrong. But it seems that by placing the alerts in the function, it
slows it down... and the error goes away!
That is known as a "heisenbug":
<url: http://info.astrian.net/jargon/terms/h/heisenbug.html />
<url: http://c2.com/cgi/wiki?HeisenBug />
<url: http://www.wordspy.com/words/heisenbug.asp />
It seems as though the code is going too fast and getting confused.
...but that doesn't really make sense to me. Has anyone ever
experienced illogical breaks like this? Any suggestions?
It seems unlikely that the code is "going too fast". It is, as Lee pointed
out, more likely an issue with the way you invoke your code.
Also, given the fact that you mention "special characters", I'd ensure
your code is either unicode compatible, or can deal with unicode
characters properly, either by rejecting them outright, or converting them
into something that you can actually submit (by modding the character code
with 256 for example).
--
Grant Wagner <gw*****@agricoreunited.com>
comp.lang.javascript FAQ - http://jibbering.com/faq
John Angel wrote: Thomas 'PointedEars' Lahn <Po*********@nurfuerspam.de> wrote [...]: John Angel wrote: [...] I have a javascript function that runs when I submit a page.
The onsubmit code does quite a bit [...] Here's the problem:
Sometimes special characters are pasted into the text area from Word.
Then, the submit code seems to go wrong - it jumbles the content and
some of the data is lost. [...]
URL?
[...]
Unfortunately, this is part of a large, internal web application. I guess
I'm just wondering whether or not it's possible for javascript (In
IE6/xp) to get "ahead of itself" as it seems to.
You could post relevant snippets of your code as well.
PointedEars
P.S.
Please read <http://netmeister.org/news/learn2quote.html> regarding
the attribution _line_ and other recommended quoting practices. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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