Script Summary: Displays the pictures larger when you roll over smaller ones on facebook.com. Modification of inYOfaceBook.
Based on the original script 'inYOfaceBook' by Justin Rosenthal, and can be viewed as an improvement to 'InYoFacebookToo' by Ian Williams.
Code is much cleaner and more efficient than both of the above. Similar to the script by Ian Williams; all images on facebook are displayed larger in the top left of the screen on mouseover, but links on images are made clickable on the larger image (this is rarely an issue, but if the large image overlaps the smaller one, it is useful). Another advantage of this script is that it doesn't conflict with inYOfaceBook if they're both installed.
UPDATE: I have modified this script to optimize load time of facebook pages. The newer version of this script is available here. This new version is recommended if you suffer from slow load times of pages on facebook. Large images are loaded as and when with that script, and all when the page loads with this one.