This function generates random UUIDs, meaning "version 4" UUIDs.
A typical generated value would be something like this: "3b12f1df-5232-4804-897e-917bf397618a"
For more information about random UUIDs, see sections 4.4 and 4.5 of RFC 4122: http://tools.ietf.org/html/rfc4122#section-4.4
This generator function is designed to be small and fast, but not necessarily good.
Small: This generator has a small footprint. Once comments are stripped, it's only about 25 lines of code, and it doesn't dojo.require() any other modules.
Fast: This generator can generate lots of new UUIDs fairly quickly (at least, more quickly than the other dojo UUID generators).
Not necessarily good: We use Math.random() as our source of randomness, which may or may not provide much randomness.
See the dojox/uuid/generateRandomUuid reference documentation for more information.
var string = dojox.uuid.generateRandomUuid();