Javascript problem explained

var configurePolygonOptions=function configurePolygonOptions(strokeColor,strokeWeight,strokeOpacity,fillColor,fillOpacity)
    {
        this.strokeColor=strokeColor;
        this.strokeWeight=strokeWeight;
        this.strokeOpacity=strokeOpacity;
        this.fillColor=fillColor;
        this.fillOpacity=fillOpacity;
    };

    configurePolygonOptions.prototype.setPaths=function setPathsForPolygon(paths)
    {
        this.paths=paths;
    };

    configurePolygonOptions.prototype.setStrokeColor=function setStrokeColor(color)
    {
        this.strokeColor=color;
    };

    configurePolygonOptions.prototype.setStrokeWeight=function setStrokeWeight(weight)
    {
        this.strokeWeight=weight;
    };

    configurePolygonOptions.prototype.setStrokeOpacity=function setStrokeOpacity(weight)
    {
        this.strokeWeight=strokeWeight;
    };


    configurePolygonOptions.prototype.setFillColor=function setFillColor(color)
    {
        this.fillColor=color;
    };


    configurePolygonOptions.prototype.setFillOpacity=function setFillOpacity(opacity)
    {
        this.fillOpacity=opacity;
    };

    configurePolygonOptions.prototype.setProperty=function setProperty(prop,value)
    {
        this[prop]=value;
    };

    configurePolygonOptions.prototype.setMap=function(map)
    {
        this.map=map;
    };

    configurePolygonOptions.prototype.setEditable=function(edit)
    {
        this.editable=edit;
    };

    configurePolygonOptions.prototype.setDraggable=function(drag)
    {
        this.draggable=drag;
    };

        var createPolygon=function createPolygon(options)
    {
        return new google.maps.Polygon(options);
    };

    var addPolygonToMap=function addPolygonToMap(poly)
    {
        poly.setMap(map);
    };

//How I used it:

    polygonOptions.setPaths(vertices);
    polygon=createPolygon(polygonOptions);
    polygon.setMap(map);

//How the listener for the custom control ending up looking:

google.maps.event.addDomListener(controlUI,'click',function(){
            console.log('polygon custom control clicked');
            mapPolygonListener=google.maps.event.addListener(map,'click',function(event){
                console.log('Vertices being added to the map');
                console.log('For each vertex a marker has been created');
                addMarkerToCurrentMap(createMapMarker(event.latLng,'Vertex'));
                vertices.push(event.latLng);
            });

        google.maps.event.addListenerOnce(map,'rightclick',function(event){
            //here is the polygon rendering code
                        var polygonOptions=new configurePolygonOptions('#FF0000',2,0.8,'#FF0000',0.35);
            var polygon;
            if(typeof mapPolygonListener!='undefined')
            {
                vertices.push(event.latLng);
                addMarkerToCurrentMap(createMapMarker(event.latLng,'End-Vertex'));
                console.log('The polygon end event is here')
                if(vertices.length>2)
                {
                    console.log('rendering polygon');
                    polygonOptions.setPaths(vertices);
                    polygon=createPolygon(polygonOptions);
                    polygon.setMap(map);
                    google.maps.event.removeListener(mapPolygonListener);
                    mapPolygonListener=void 0;
                }
            }
        });

        },false);