Backward and forward in GL and in Web site

Question

Two parts to this:
PART 1, INSIDE GO LIVE
Let's say I am viewing one page, page A. On that page I click a link that takes me to page B while closing page A. After viewing page B I want to return to page A.
If this were a browser, I'd simply click the back button or Command-[ and go back to page A.
But within GoLive 7, there is, as near as I can find, no way to click anything to go back to page A. I simply have to go back to the site window and reopen that page. Even Key Shortcuts lists nothing.
Is there a way?
PART 2, WITHIN A WEB SITE
Let's say I am viewing a page, page Th with thumbnails of some of my work. I click one of the thumbnails which takes me to a page with a larger image, call it page L.
Having looked at page L I now want to return to page Th. How do I do that?
Here is an example of how someone else did it, I think, using a numbering system.
http://www.alcorngallery.com/John_Alcorn/JohnAlcorn_image.php?number=035
If you click on one of the triangles left or right you move forward or backward one image.
I'd like to do something similar. Perhaps using the triangles in Zapf Dingbats, create a component. In the component, make the left arrow go back to the previously viewed page, whatever it happened to be. And make the right arrow go to the next page in sequence. (Not sure how to determine that as I have no numbering sequence and do not want one at this point. But a step at a time.)

Answer 1

Since I am not a fan of encouraging continued use of elements specific to discontinued software, here is how you would do it in any editor...
PART 1 sample javascript code...
<a href="javascript: history.go(-1)">Back</a>
PART 2 sample PHP code...
<?php
//NAME EACH ASSOCIATED IMAGE FILE 1.jpg, 2.jpg, 3.jpg...
//CHANGE THE '21' BELOW TO WHATEVER IS THE HIGHEST NUMBER OF YOUR IMAGE ARRAY
$maxpage=21;
$currentpage=$_GET[number];
$previouspage=$currentpage-1;
$nextpage=$currentpage+1;
//DISPLAYS IMAGE
echo '<img src="images/' . $currentpage . '.jpg"><br>';
if ($previouspage>0) {
  echo '<a href="JohnAlcorn_image.php?number=$previouspage">BACK</a> - ';
echo '<a href="JohnAlcorn_index.php">INDEX</a> - ';
if ($currentpage<$maxpage) {
  echo '<a href="JohnAlcorn_image.php?number=$nextpage">NEXT</a>';
?>