Simple function to simulate async

fakeAsync.js

/********************************************/
/* insert random delays to simulate latency */
/********************************************/
function delay(callback, n) {
  var r = Math.floor(Math.random()*(n || 5000));
  setTimeout(function() { callback(); }, r);
}

// specify a max on the delay timer range
delay(function() { console.log('BLARGH!'); }, 10000);

// use default 5000ms max timer
delay(sayHonk);

function sayHonk() { console.log('HONK!'); }