Random bit of maths, given if you want compatibility with older IE's you're limited to around 2000 characters in the fragment string. Assuming you base 64 encod

Random bit of maths, given if you want compatibility with older IE's you're limited to around 2000 characters in the fragment string. Assuming you base 64 encode to generate valid urls, you can only fit an 8x8x8 grid into the fragment string.