What do you want to accomplish? Are you trying to output an HTML page with images in it? (That's my best guess, but your post is not particularly clear.)

What have you tried so far in your attempts to do this? What did you want the result(s) to be? What actual result(s) did you get?

You may also wish to review How (Not) To Ask A Question.

So is this all going to be handled by a single cgi script? Or do you have a multiple cgi scripts handing everything?

The very basic thing you could do is send out a form, with 3 images, that upon clicking return different params to a cgi script.

#Here is  some UNTESTED PSEUDOCODE  to show the idea. There are 2 basi
+c functions. One is send out the form, the second is to receive a res
+ponse from the form and process it. My cgi is rusty, so anyone who ca
+n fix the errors, please do.

#!/usr/bin/perl
use warnings;
use strict;
use CGI;

my( $q ) = new CGI;

print $q->header;
print $q->start_html( -title=>"Test" );
print $q->start_form(-action=>'this_script.cgi);

# Add images
# image_button() produces a clickable image.  When its clicked on the
#  position of the click is returned to your script as "button_name.x"
+ and
# "button_name.y", where "button_name" is the name youve assigned to i
+t.
print $q->image_button(button_name1, /path/source/URL, MIDDLE);
print $q->image_button(button_name2, /path/source/URL, MIDDLE);
print $q->image_button(button_name3, /path/source/URL, MIDDLE);

print $q->submit( -name=>'Choose Action', -label=>'Start Test' );
print $q->br;

print $q->end_form;
print $q->end_html;

# this is where you detect which button is pressed
if ( $q->param() ) {
my $button = $query->param(); 
#probably need better param  checking
#use 
#@params=$query->param; 
#gets a list of all the names of the parameters passed to the script
print "@params\n";

if ($button eq 'button_name1'){'do something'}
if ($button eq 'button_name2'){'do something'}
if ($button eq 'button_name3'){'do something'}

}
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