JavaScript原型问题（使用Google Maps）

Question

I'm trying to write a clean GoogleMap.js script. I have created a js class wich contains gMarker and gInfoWindow and i want to set a "openedInfoWindow" property in its prototype (shared), so i can close it and change it anytime the user clicks on the particular gMarker without stating it as global.

function gMarkerWInfo(gMarker,gInfoWindow){
    if(!gMarker || !gInfoWindow)
        return null;
    this.Marker = gMarker;
    this.InfoWindow = gInfoWindow;
}

gMarkerWInfo.prototype.openedInfoWindow = null;

gMarkerWInfo.prototype.openInfoWindow = function(){
    if(this.openedInfoWindow){
        alert(this.openedInfoWindow.getContent());
        //openedInfoWindow.close();
    }
    this.InfoWindow.open(this.Marker.getMap(),this.Marker);
    this.openedInfoWindow = this.InfoWindow;
}

The "alert" is for debug purpose and, everytime i click it, it shows me the content of the InfoWindow "linked" to the gMarker i just clicked on. So the "openedInfoWindow" doesn't work how i hope. Can anyone help me?

PS. Here's the function that i use to create the gMarkerWInfo inside the "GoogleMap" class:

this.createMarkerWInfo = function(LatLng,Name,HTML_Infos){
    var gMarker = new google.maps.Marker({  position: LatLng,
                                            animation: this.MarkerAnimation,
                                            map: priv_Map,
                                            title: Name
                                        });
    var gInfoWindow = new google.maps.InfoWindow({content:HTML_Infos});
    var gMarkerWInfoWindow = new gMarkerWInfo(gMarker,gInfoWindow);
    google.maps.event.addListener(gMarker,'click', function() {gMarkerWInfoWindow.openInfoWindow();});
    return gMarkerWInfoWindow;
}

Answer 1

Reading this article i found this out: " The definition: A function's prototype property is the object that will be assigned as the prototype to all instances created. [...] It's important to understand that a function's prototype property has nothing to do with its actual prototype. "

So i understood that the Object.prototype , wich i was trying to use before, isn't the same as the Function.prototype , wich suits my interests.

So here it is, finally working:

function gMarkerWInfo(gMarker,gInfoWindow){...}

gMarkerWInfo.prototype.openedInfoWindow = null;

gMarkerWInfo.prototype.openInfoWindow = function(){
   if(gMarkerWInfo.openedInfoWindow)
           gMarkerWInfo.openedInfoWindow.close();
    this.InfoWindow.open(this.Marker.getMap(),this.Marker);
    gMarkerWInfo.openedInfoWindow = this.InfoWindow;
}