title: What is the scope of a function in Javascript/ECMAScript?
body: <p>Today I had a discussion with a colleague about nested functions in Javascript:</p>
  
  <pre><code>function a() {
     function b() {
        alert('boo')
     }
     var c = 'Bound to local call object.'
     d = 'Bound to global object.'
  }
  </code></pre>
  
  <p>In this example, trials point out that b is not reachable outside the body of a, much like c is. However, d is - after executing a(). Looking for the exact definition of this behaviour in the <a href="http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf" rel="noreferrer">ECMAScript v.3 standard </a>, I didn't find the exact wording I was looking for; what Sec.13 p.71 does not say, is which object the function object created by the function declaration statement is to be bound to. Am I missing something?</p>