popWin = open ( "POPpagePOPTEMP6.php?image=" + target, "popWindow", specs);
Note that, as usual, I show for PHP.
Then, in "POPpagePOPTEMP6.php"
<?php
...
if ($_GET ['image']) $image = $_GET ['image'];
...
?>
<html>
...
<img src="<?php echo $image;?>"/>
...
</html>
or whatever all you want in the image tag.
You have a lot of studying to do and things to catch up on if you're going to produce these things professionally.