Can I Retrieve An Ipad Unique Device Identifier That Through Safari With A Js Web App?

We have an application running on a Windows Server and being accessed by IPads from Safari. The web part is written in javascript. We would like to store user preferences in the se

Solution 1:

I would think this is a very bad idea(tm).

Instead, why not just do what everyone else does and store your own generated ID in a cookie that pretty much never expires?