How to access the var of the listenerObject - is it possible?

I use DateChooser component and I have one general q. how to access the var of the listenerObject - is it possible?

I would like to compare two values:
one in listenerObject fn and second in another fn.

I think is it not possilble, because the created var in fn is local var, isn’t it?

Here is the code example:

// store arival date for arival_dc
var listenerObject:Object = new Object ();
listenerObject.change = function (eventObject:Object)
{
    var myDate = new Date (eventObject.target.selectedDate);
    var myDay:Number = myDate.getDate ();
    var _myMonth:Number = myDate.getMonth () + 1;
    var myYear:Number = myDate.getFullYear ();
    trace (myDate.getDate ());
    // the day of the month 
    trace (myDate.getMonth () + 1);
    // add 1 to the month because getMonth() returns values in the range 0 - 11
    trace (myDate.getFullYear ());
    _root.createTextField ("myArivalDate_txt", _root.getNextHighestDepth (), 300, 600, 150, 20);
    _root.myArivalDate_txt.border = true;
    _root.myArivalDate_txt.text = myDay + "." + _myMonth + "." + myYear;
    //
};
arival_dc.addEventListener ("change", listenerObject);