title: In XMLHttpRequest, where is error flag variable?
body: <p>In the <a href="http://www.w3.org/TR/XMLHttpRequest/#error-flag" rel="noreferrer">XMLHttpRequest Spec</a> it says that:</p>
  
  <blockquote>
    <p>The DONE state has an associated error
    flag that indicates some type of
    network error or abortion. It can be
    either true or false and has an
    initial value of false.</p>
  </blockquote>
  
  <p>Also says something similar about a "send() flag" in an "OPENED" state.</p>
  
  <p>It's said in the specification but not in the IDL and when I create a new XMLHttpRequest I can't find those "flags".</p>
  
  <p>Where are those boolean variables? </p>