title: how to get all objects of a given type in javascript
body: <p>I want to retrieve all objects (not DOM elements) of a given type created with the "new" keyword.</p>
  
  <p>Is it possible ?</p>
  
  <pre><code>function foo(name)
  {
    this.name = name;
  }
  
  var obj = new foo();
  </code></pre>
  
  <p>How can I retrieve a reference to all the foo objects ?</p>