Function to get a unique guid of the specified length (32 is default)

guid.js

function guid(t) {
  var a, r = [], e = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", n = e.length;
  for (t = t || 32, a = 0; t > a; a++) {
    r[a] = e.charAt(Math.floor(Math.random() * n));
  }
  return r.join("");
}