Monday, 18 December 2017  
3.1.7 Rand_image: Produce a random image on your web page
##############################################################################
# Basic Random Image Displayer  Version 1.2                                  # 
# Copyright 1996 Matt Wright    mattw@worldwidemart.com                      #
# Created 7/1/95                Last Modified 7/20/95                        #
# Scripts Archive at:           http://www.worldwidemart.com/scripts/        #
##############################################################################
# If you run into any problems while trying to configure this scripts, help  #
# is available.  The steps you should take to get the fastest results, are:  #
#       1) Read this file thoroughly					     #
#       2) Consult the Matt's Script Archive Frequently Asked Questions:     #
#               http://www.worldwidemart.com/scripts/faq/	             #
#       3) If you are still having difficulty installing this script, send   #
#          e-mail to: scripts-help@tahoenet.com				     #
#          Include any error messages you are receiving and as much detail   #
#          as you can so we can spot your problem.  Also include the variable#
#          configuration block that is located at the top of the script.     #
#									     #
# Hopefully we will be able to help you solve your problems.  Thank you.     #
##############################################################################
# COPYRIGHT NOTICE                                                           #
# Copyright 1996 Matthew M. Wright  All Rights Reserved.                     #
#                                                                            #
# Basic Random Image may be used and modified free of charge by anyone so    #
# long as this copyright notice and the comments above remain intact.  By    #
# using this this code you agree to indemnify Matthew M. Wright from any     #
# liability that might arise from it's use.                                  #  
#                                                                            #
# Selling the code for this program without prior written consent is         #
# expressly forbidden.  In other words, please ask first before you try and  #
# make money off of my program.                                              #
#                                                                            #
# Obtain permission before redistributing this software over the Internet or #
# in any other medium.  In all cases copyright and header must remain intact.#
##############################################################################

The Random Image Displayer will allow you to call on different images each 
time your page is reloaded and accessed.  The Random Image Displayer consists 
of two files, the rand_image.pl and README.

                rand_image.pl - The perl script that calls on the random image.
                README - This file (Installation instructions)

This is one of my more simple scripts, yet still very useful for its purpose.  
Below is a description of how to configure the files:

RAND_IMAGE.PL -
        This is the main file and the one that is called upon every time your 
page is loaded.  You will need to place this file in your server's cgi-bin and 
give users the permission to read/execute this file. (chmod 755 or chmod a+rx)  
There are also several variables you will have to define:

        # Define Necessary Variables
           $basedir = "";
                This is the http address and base directory that your pictures
                are placed in.  This is in url form.  The filenames you 
                specify will be appended to this address.  Examples Below.
           @files = ("","");
                These are all of your files placed into array.  The filenames 
                should be reflective of the location of the files relative 
                to your $basedir. Examples Below.

        # Choose Options
           $uselog = 1;    # 1 = YES; 0 = NO
                You can enable the usage of a short log, which will simply log 
                the name of each file as it is accessed.  Not very fancy, but 
                it can be useful.
           $logfile = "";
                The system path to your log file and where you want it kept.  
                Keep in mind that this log file must be placed in a world 
                writable directory.  If you don't create a log file, but 
                point the path to a world writeable directory and give it a 
                false filename, the script will create the file for you.  This 
                is not a required variable if you turn off $uselog.
________________________________________________________________

README -
        All you have to do with this file is read it!  :)
________________________________________________________________

Example:
Let's say I have 5 files.  They are  all in a root directory called: 
/home/mattw/public_html/, but from there they branch out to:
pics/funny.gif, nature/waterfalls.gif, pics/cool.gif, nature/tree.gif, and 
pics/www.gif.  Where pics/ and nature/ are directories that these images are 
located in.  Your variables should show as follows:

$basedir = "http://alpha.pr1.k12.co.us/~mattw/";
@files = ("pics/funny.gif","nature/waterfalls.gif","pics/cool.gif",
          "nature/tree.gif","pics/www.gif");

It's that easy!
________________________________________________________________

How do I implement this in my pages?
        This file can be used in your pages in one of the following syntaxes.  
It can do backgrounds, or just plain image references.  To activate it do the 
following:
<img src="http://www.ser.ver/cgi-bin/rand_image.pl">
        This is when you want it to call a random image.
<body background="http://www.ser.ver/cgi-bin/rand_image.pl">
        This is when you want it to call a random background.

Things to be careful of:
        If you are using it as a random background program, you will want to 
make sure that all of your backgrounds will work with the specified colors.  
In other words, if you have a dark and a light image in your random image path 
it will be hard to find a text color to work in both instances.
________________________________________________________________
HISTORY:
Version 1.0             7/1  - First Created
Version 1.1             7/17 - Completely Re-written. Less variables to fill 
                               in, added flexibility: including pics in 
                               different directories and pics with names 
                               unlike others.  A big improvement over the last
                               version.  You can also have different 
                               extensions like .jpg and .gif.
Version 1.2             7/20 - Eliminated the $numfiles variable and can now 
                               take the random number straight fom the array.
________________________________________________________________

Use this script freely and enjoy!  All that I ask is that you register your 
script with me either by mailing me the url of where I can find it or filling 
out the form located at:
http://worldwidemart.com/scripts/implement.html

This registration is free but it allows me to add you to a list showing other 
examples of my scripts, as well as it allows me to inform you of any upgrades 
I ever release.  Thanks.

I also ask that you keep my name somewhere in the scripts.  Not necessarily in 
a spot viewable to your users (although it would be nice) but somewhere behind 
the scenes as a point of reference.

If you modify this script, please let me know just so I can improve it for 
other users as well.  Enjoy!
_____________________________________________________________________________
Matt Wright - mattw@worldwidemart.com - http://www.worldwidemart.com/scripts/
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