script_queue.js

var ScriptQueue = function(){
  var $this = this; 
  var cbStack = [];
  var currentCbIndex = -1;
  
  this.cbTimers = {};
  this.queue = function(cb){
    cbStack.push(cb);
    return $this;
  }
  
  this.start = function(){
    for(var i in cbStack){
      if( i == 0 ){
        if($this.debug)
          console.log("[CB-{0}]".format(i),"Time:", new Date().getMilliseconds(), " Starting cb-"+i);
        $this.cbTimers[i] = 0;
        cbStack[i](i);
      } else {
        $this.cbTimers[i] = wait(i, function(){
          cbStack[i](i);
        });
      }
    }
  }
  this.stop = function(){
    if( $this.debug ) console.log("Stopping.");
    for(var i in $this.cbTimers){
      clearTimeout($this.cbTimers[i]);
    }
  }
  
  var wait = function(idx, cb){
    return setInterval(function(){
      if($this.cbTimers[idx-1] != null) {
        if($this.debug)
          console.log("[CB-{0}]".format(idx),"Waiting for CB-"+(idx-1));
        return;
      }
      clearInterval($this.cbTimers[idx]);
      if($this.debug)
        console.log("[CB-{0}]".format(idx),"Time:", new Date().getMilliseconds(), " Starting cb-"+idx);
      cbStack[idx](idx);
    }, 200);
  }
}