tidPoller: undefined /* poller timer */,
        $initialDelay: 1000 /* initial polling interval (ms) */,
        currentDelay: 1000 /* current polling interval */,
        maxDelay: 60000 /* max interval when backing off for
                              connection errors */,
        minDelay: 5000 /* minimum delay time */,
        tidReconnect: undefined /*timer id for reconnection determination*/,
        randomInterval: function(){
          return Math.floor(Math.random() * this.minDelay);
        randomInterval: function(factor){
          return Math.floor(Math.random() * factor);
        },
        incrDelay: function(){
          if( this.maxDelay > this.currentDelay ){
            if(this.currentDelay < this.minDelay){
              this.currentDelay = this.minDelay;
              this.currentDelay = this.minDelay + this.randomInterval(this.minDelay/2);
            }else{
              this.currentDelay *= 2;
              this.currentDelay = this.currentDelay*2 + this.randomInterval(this.currentDelay/2);
            }
            this.currentDelay += this.randomInterval();
          }
          return this.currentDelay;
        },
        resetDelay: function(){
          return this.currentDelay = this.$initialDelay;
        },
        isDelayed: function(){