JMeter Variables - picking a random value

To randomize form submission data in Jmeter, I've put together a sampler that selects a random element from a hard-coded list of options.  The result is a variable named nextAction that can be used later in the plan.  I've needed this for population of a field that has a defined set of expected values at the server.

Type:  BSF Sampler
Name:  set nextAction
Language:  javascript
Script:

var opts = ['create','comment','update','close'];
var opt = opts[Math.floor(Math.random() * opts.length)];

vars.put("nextAction",opt);
opt