reload only pictures and text without reloading background

[giggi]

I would like to do a "simple to maintain and create" site very quickly and fast: but it rely mainly in pictures...I made a trip in Australia: I have 250 days to describe and 1000 pictures to show.
My idea is shown at this site:

http://www.geocities.com/bedford_ch/navigation.html

they are 3 pictures per day and a brief text to show.
Every click on next and previous must shown the day after or before. Possibility to choose a day with a text box. The background will always be the same: my main idea is to avoid it to reload at every next and previous, but only load the pictures and the text.
As I'm a newbie and never created any line in javascript, is there any manner to do it ? May I use frames (the template is really hard to shown as frames...). The idea is to put a name for every file like this:
day1: image1_0001.jpg, image2_0001.jpg, image3_0001.jpg, text_0001.txt
day125: image1_0125.jpg, image2-0125.jpg, image3_0125.jpg, text_0125.jpg.

if pushedbutton = next then
day = day + 1
else
if pushedButton = previous then
day = day-1

function show()
loadImageInplace1("image1_" + (fillWithzeros(day)) + Str(day));
loadImageInplace2(....

something like this (I come from Delphi...)...so could anybody help me...

Many thanks.