That looks really nice. I spend about 5 hours refreshing the page so I could see every single one.

so did you mean one of the pictures to be the wrinkles on somebody's forehead and part of their hairline??

Yes. That was going to be the other one with my eye. I pasted from the original, and it just struck me as being somewhat interesting.

I thought it was a mistake, but Dave said he knew you well enough to know that you meant to do that. :-)

For comparison, here's how I did it in PHP for Wordpress (far a church website). This includes a chooser where you can see them all and pick your favorite, using a cookie to remember. It's interesting to see how similar things are done in completely different environments. Hope this works and it doesn't reject or mangle the code...

<?php

$dir = "wp-content/themes/gemini-wpg2/images/header";
$imgs = Array();

if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if( preg_match("/^[^\.].*(\.jpg|\.jpeg)$/i",$file) ) {
$imgs[] = $file;
}
}
closedir($dh);
}

if( isset($_REQUEST['i']) ) {
$i = $_REQUEST['i'];
if( $i < 0 ) {
setcookie("ones_pick_header",0,time()+60*60*24*365,"/",".ones2one.org");
} else {
setcookie("ones_pick_header",1,time()+60*60*24*365,"/",".ones2one.org");
setcookie("ones_header",$i,time()+60*60*24*365,"/",".ones2one.org");
}
}

$show_sidebar = false;
$width = "style='width:100%;'";

include('./wp-config.php');
error_reporting(E_NONE);
get_header();
?>
<div id="main">
<h1>Choose Title Image:</h1>

<?php
if( !isset($_REQUEST['i']) ) {
?>
<h2><strong><a href='header_image.php?i=-1'>Rotate through all</a></strong>.</h2>
<?php
foreach( $imgs as $i => $img ) {
echo "<a href='header_image.php?i=$i'><img src='$dir/$img' width='680'/></a><br/>\n";
}
} else if( intval($_REQUEST['i']) >= 0 ) {
echo "<p><strong>Image chosen. It will take effect when you return.</strong></p>";
echo "<strong><a href='http://www.ones2one.org/'>Return</a></strong>";
} else {
echo "<p><strong>Title Image will rotate through all available images.</strong></p>";
echo "<strong><a href='http://www.ones2one.org/'>Return</a></strong>";
}
?>

</div>

<?php get_footer(); ?>

Oh well, I HTML-ized the < and >, but I guess it escaped the &'s. You get the idea...

Sorry for the plethora of comments, but that code does the choosing.. Oops.. Here's the code that does what your handler does..

<?php

$dir = "header";
$imgs = Array();

if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if( preg_match("/^[^\.].*(\.jpg|\.jpeg)$/i",$file) ) {
$imgs[] = $file;
}
}
closedir($dh);
}

header("Content-type: image/jpeg");
$f = fopen("$dir/".$imgs[array_rand($imgs)],"r");
while( $d = fread($f,1024) ) {
echo $d;
}
?>

It's been a while since I've used this code, so I kinda forgot what was where. =P

Really cool stuff!