Hi,

This is not really a cgiapp-specific question, but the
answer may be short and nobody will get hurt if I ask it.

I have a statistical data analysis application generating
plots dynamically from data stored in a data base.  The
plots are inserted into HTML pages using a dynamically-generated 
<img src=plot.cgi?prm=1;prm=2;prm=3...> tag.  The list of
parameters may be very long.  

The long plot URL presents a problem in IE browser which,
apparently, chops URL's to 2048 characters causing plot.cgi
script to crash.  This IE behavior is, of course,
undocumented and there is no option in browser configuration
to override that.  Mozilla does not have this limitation
(why should it?).

There is no problem when parameters are submitted using POST
method through forms, but if I want to show the plot in
HTML, I have to provide plot URL, don't I?

I consider the following solutions:

1. Detect when the URL is too long and place a submit button
instead of the <img> tag.  The obvious inconvenience is that
the image will be displayed by itself on a separate page and
the user will have to click "Back" to return to the plot
options.

2. Find a way to submit parameters for the image using POST
method and still show it in HTML.  Can I do that?  Should I
use JavaScript for that?  I have not used JavaScript yet. 

Another problem is that the image is generated by a second
HTTP request and requires to run a separate script slowing
down the application.  Is there a way to insert an image
DIRECTLY into HTML (I mean the actual PNG file, not the
image URL)?
 
All suggestions will be greatly appreciated.

Thank you.

Arkady. 
 
 

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