event.js

var Event = function Event() {
    var _target;

    this.setTarget = function setTarget( value ) {
        value = value || '';

        if ( value ) {
            _target = value;    
        }
    }

    this.getTarget = function getTarget() {
        return _target;    
    }

    this.getName = function getName() {}
};

var event = new Event();

event.setTarget('My test');

console.log(event.getTarget());