On Dec 23, 11:34 am, Webmaster <[email protected]>
wrote:
> function MyApplication() {
>   this.counter = 0;
>   this.map = new GMap2(document.getElementById("map_canvas"));
>   this.map.setCenter(new GLatLng(37.4419, -122.1419), 13);
>   GEvent.bind(this.map, "click", this, this.onMapClick);
>
> }
>
> MyApplication.prototype.onMapClick = function() {
>   this.counter++;
>   alert("You have clicked the map " + this.counter +
>         (this.counter == 1 ?" time":" times"));
>
> }
>
> function initialize() {
>   if (GBrowserIsCompatible()) {
>     var application = new MyApplication();
>   }
>
> }
>
> This is a example code taken from the google maps api documentation.

Where?

> In the GEvent() function we refer to the method we want to bind the
> event to as:
> this.onMapClick.
> It is my understanding that 'this' refers to 'MyApplication()'
> so this.onMapClick = MyApplication.onMapClick
> So why do we have
> MyApplication.prototype.onMapClick = function()
> Where does the 'prototype' come from?

It is part of the javascript definition, please refer to the
javascript specification or a javascript tutorial.

  -- Larry

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