Used when a media file (image) needs to be shown in a popup window. This skin defines the layout that will be used in that case.
Very basic buildup for an imagepopup page:
<html>
<head>
<title><%imagetext%></title>
<style type="text/css">
img { border: none; }
</style>
</head>
<body>
<a href="javascript:window.close();"><%image%></a>
</body>
</html>