Returns a random UUID in javascript

uuid.js

/**
 * @see http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript#answer-13403498
 * @see https://gist.github.com/jed/982883
 */
function b(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,b)};

var uuid = b();