I use this line to populate the array within collection:

cc.newevent(ms_time,this.element.id,this.element.buttonstate);

Here is the definition of newevent:

 this.newevent = function(time0, id0, state0) {
    	    console.log("newevent");
    	    this.events.push(event_definition());
    	    var event = this.events[this.events.length-1];
    	    event.time = time0;
    	    event.id = id0;
    	    event.state = state0;
    }