dumb queue

dumbqueue.js

var queue = [],
    running = false;
    
function addToQueue(job){
   queue.push(job);
   processJob();
}

function processJob(){
    var job;
    if(queue.length > 0 && !running){
      running = true;
      job = queue.shift();
      doSomethingAsync(job, function(){
        running = false;
        processJob();
      });
    }
}