Images display only intermittently in browser (Cross posted in IE)

I have a problem with our hosted web site where a page will load and the
images will not display.

This is not the case where a placeholder is displayed in lieu of the image,
my problem is that there is a gap or blank spot where the images should be.

The problem is random and intermittent, sometimes the images display and
sometimes they do not. Sometimes I can get them to display by continually
refreshing the page until they do.

I do not know if this is a browser issue, an IIS issue or a network issue.
The problem does not appear to exist in IE7 but it does in all other types
of browsers.

I have documented the issue with screenshots (hoepfully they will display)
at http://www.frickcpa.com/TVOM/error.asp.

If anyone has any thoughts on this, please let me know.

Thanks
Dave

Re: Images display only intermittently in browser (Cross posted in IE)

Please document the missing/changed HTML that results in the gap/blank
spot.

If the HTML changes, then we need to figure out where the change comes
from. Either custom code runs on server to manipulate your HTML or
intervening networking devices made the modification. In either case,
the issue has nothing to do with IE or IIS. You will need to contact
your web hosting company for answers.

If the HTML does not change, then it seems that the IMG is
sporadically failing to get to the client. Either:
1. IE sporadically renders a gap/blank spot for missing IMG
2. IIS is sporadically not sending IMG
3. Network is sporadically dropping IMG
4. Hosted website is throttling the display of the IMG

You can troubleshoot this by looking at network trace of what actually
is returned from the server.
- If IE is sporadically rendering incorrectly, you will see evidence
of IMG with error status code from server
- If IIS is sporadically not sending IMG, you will see evidence of IMG
with error status code from server
- If network is sporadically dropping IMG, you will see NO evidence of
IMG at all
- If hosted website is throttling the display of IMG, you will either
see truncated but successful IMG status, or error status


FYI: You are not cross-posting in IE newsgroup. I don't see their
responses here on the same thread. You multi-posted between IIS and IE
newsgroups.


//David
http://w3-4u.blogspot.com
http://blogs.msdn.com/David.Wang
//






On Sep 16, 10:41 am, "Dave" wrote:
> I have a problem with our hosted web site where a page will load and the
> images will not display.
>
> This is not the case where a placeholder is displayed in lieu of the image,
> my problem is that there is a gap or blank spot where the images should be.
>
> The problem is random and intermittent, sometimes the images display and
> sometimes they do not. Sometimes I can get them to display by continually
> refreshing the page until they do.
>
> I do not know if this is a browser issue, an IIS issue or a network issue.
> The problem does not appear to exist in IE7 but it does in all other types
> of browsers.
>
> I have documented the issue with screenshots (hoepfully they will display)
> athttp://www.frickcpa.com/TVOM/error.asp.
>
> If anyone has any thoughts on this, please let me know.
>
> Thanks
> Dave

Re: Images display only intermittently in browser (Cross posted in IE)

Hi Dave,

I use IE7 to access the site and everything appears to work fine as you
stated. Could you please test on the problematic clients by accessing the
image directly, i.e:

http://www.frickcpa.com/TVOM/images/010_hp.gif

Press refresh in IE6 to check if the image lost symptom still persists in
this case. If not, I suspect if the problem has some relationship with
browser compatibility and Javascript code used in the page since you use
Javascript to hidden/display the sections and IE7 doesn't encounter the
same issue.

If possible, please feel free to send the pages and image file to me at:
wjzhang@online.microsoft.com (please remove online. ). I'll be glad to
check if the same problem can be reproduced at my side and if so, perform a
deep investigation and update with any findings I get.

It's also necessary to test on the server locally or from the internal LAN
to check the possibility of an instable networking or proxy/firewall
infection.

I look forward to your update.

Have a nice week.

Sincerely,

WenJun Zhang

Microsoft Online Community Support

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Re: Images display only intermittently in browser (Cross posted in IE)

WenJun Zhang:



Thank you for your help.



I have sent you the asp page and image files we discussed.



I have also updated the error documentation here:

http://www.frickcpa.com/tvom/error.asp



I have summarized the possible causes of the problem as:

a.. Images tags being rendered dynamically from the database issue
b.. browser compatibility issue with Javascript and DIV tags
c.. network intermittently dropping image files
d.. indexing issue on large number of files in image folder
e.. web server throttling the transmission of image files
f.. other web server configuration issue
g.. web server load issue
I have created a new page that does not use javascript to toggle the
display on and off. I simply appended a "2" to the page name as:



http://www.frickcpa.com/tvom/TVOM_Answer2.asp?qno=1



I will do further checking in the morning.



Thank you for your help.

Dave

Re: Images display only intermittently in browser (Cross posted in IE)

Thnak you for your help David.

These are excellent suggestions.

I will contact my web host provider to discuss them.

I have also updated the error documentation here:
http://www.frickcpa.com/tvom/error.asp

Once again, thank you for your help.
Dave