This script resizes a image in an AJAX window.
Installation:
Login in your CP then go to Customize design - any module - Appearance of entries / Page with entry full text and its comments and add the following code where the script should be.
Code
<script type="text/javascript">
function screenBig$ID$(){
var ajax_data = '<div style="background:#fff; padding:3px;"><img src="$IMG_URL1$" /><div align="right"><hr><a href="http://uScripts.de/">UcozBaze</a></div>'; new _uWnd('screen','Screenshot',400,250,{autosize:1,shadow:1,autosizeonimages:1,modal:1,close:1,},ajax_data);}
</script>
<a href="javascript://" onclick="screenBig$ID$()" title="Click on the image to resize it"><img style="max-width:150px;max-height:200px;border:0px;" src="$IMG_URL1$" ></a>