In your copy of the featuredimagezoomer.js script:
The local path is causing a security error. It should point to a copy of spinningred.gif on the server.
/*Featured Image Zoomer (May 8th, 2010)
* This notice must stay intact for usage
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
//Last updated: May 10th, 2010
file:///C:/Users/Geoff/Desktop/Website autumn winter 2010/imagezoomscript/spinningred.gif', //full path or URL to "loading" gif
magnifycursor: 'crosshair', //Value for CSS's 'cursor' attribute, added to original image
There could also be other problems, but that has to be fixed. I suspect there are other local paths that need to be fixed.