Ajax requests queue

ajax_queue.js

var AjaxQueue = {
  batchSize: 1,
  urlQueue: [],
  elementsQueue: [],
  optionsQueue: [],
  setBatchSize: function(bSize) {
      this.batchSize = bSize;
  },
  push: function(url, options, elementID) { 
    this.urlQueue.push(url);
    this.optionsQueue.push(options);
    if(elementID !== null){
      this.elementsQueue.push(elementID);
    } else {
      this.elementsQueue.push("NOTSPECIFIED");
    }
 
    this._processNext();
  },
  
  _processNext: function() {
    if(Ajax.activeRequestCount < AjaxQueue.batchSize) {
      if(AjaxQueue.elementsQueue.first() === "NOTSPECIFIED") {
        new Ajax.Request(AjaxQueue.urlQueue.shift(), AjaxQueue.optionsQueue.shift()); 
        var junk = AjaxQueue.elementsQueue.shift();
      } else {
        new Ajax.Updater(AjaxQueue.elementsQueue.shift(), AjaxQueue.urlQueue.shift(), AjaxQueue.optionsQueue.shift());
      }
    }
  }
};
Ajax.Responders.register({
  onComplete: AjaxQueue._processNext
});
 
/************* SYNTAX ***************
AjaxQueue.setBatchSize(size);
 
AjaxQueue.push(URL , OPTIONS, [ElementID]);
 
************** USAGE ***************
AjaxQueue.setBatchSize(4);
AjaxQueue.push("http://www.testingqueue.com/process/",{onSucess: funcSuccess, onfailure: funcFailure});
AjaxQueue.push("http://www.testingqueue.com/process1/",{onSucess: funcSuccess1, onfailure: funcFailure1}, "myDiv");
AjaxQueue.push("http://www.testingqueue.com/process2/",{onSucess: funcSuccess2, onfailure: funcFailure2});
AjaxQueue.push("http://www.testingqueue.com/process3/",{onSucess: funcSuccess3, onfailure: funcFailure3});
AjaxQueue.push("http://www.testingqueue.com/process4/",{onSucess: funcSuccess4, onfailure: funcFailure4});
AjaxQueue.push("http://www.testingqueue.com/process5/",{onSucess: funcSuccess5, onfailure: funcFailure5});
**********************************/