imana97

var Queue = function() { 
    // copy this to self 
    var self = this; 
    //initiating an empty queue 
    self.queue = []; 
    //initiating an empty object for to keep the last json data fetched by ajax 
    self.lastData = null; 
 
    // this methods add a function to the queue 
    self.next = function(func) {