Here's some PHP code that should work.. Just to get the concept across.. I'm sure other code could look a lot prettier 
PHP Code:
<?
$pics = array(
1 => "somepic1.jpg",
2 => "somepic2.jpg",
3 => "somepic3.jpg"
);
if (isset($id))
{
echo "<img src=\"$pics[$id]\"><br>\n";
if ($id != 1)
{
?><a href="<?echo $PHP_SELF;?>?id=<?echo $id-1;?>">Previous</a><?
}
}
while (list ($pic_id, $pic) = each($pics)) {
if ($id == $pic_id)
{
print " $id ";
} else {
print (" <a href=\"$PHP_SELF?id=$pic_id\">$pic_id</a> ");
}
}
if (isset($id))
{
if ($id != sizeof($pics))
{
?><a href="<?echo $PHP_SELF;?>?id=<?echo $id+1;?>">Next</a><?
}
}
?>
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