What Every Computer Scientist Should Know About Floating Point Arithmetic - CiteSeerX
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.22.6768
Fixed Floating Elements | jQuery for Designers - Tutorials and screencasts
http://jqueryfordesigners.com/fixed-floating-elements/

jQuery for Designers - Tutorials and screencasts

This replicates the floating box as seen in apple's store.

Fixed Floating Elements | jQuery for Designers - Tutorials and screencasts - http://jqueryfordesigners.com/fixed-floating-elements/