title: as3: usage of this keyword
body: <p>I am just wondering when it's necessary to use the keyword <code>this.somevar</code> instead of just <code>somevar</code>.</p>
  
  <p>I usually don't use this under the following circumstances:</p>
  
  <ol>
  <li>i have made a var private for a class</li>
  <li>i refer to it in order to use it as a local var for that class</li>
  </ol>
  
  <p>correct? or is this not just a style thing?</p>