title: Extendscript xml with dash element node
body: <p>How do you access to an xml element with dash inside it? And modify it?
  Exemple:</p>
  
  <pre><code>&lt;root&gt;
   &lt;bookstore&gt;
        &lt;Author&gt;
             &lt;book-en&gt;sample&lt;/book-en&gt;
             &lt;book-fr&gt;test&lt;/book-fr&gt;
             &lt;book-de&gt;testtest&lt;/book-de&gt;``
             etc.....
  </code></pre>
  
  <p>I try with:</p>
  
  <ul>
  <li><p>myxml.bookstore.Author.book-en="toto"-->Not work</p></li>
  <li><p>myxml.bookstore.Author.('book-en')="toto"-->Not work</p></li>
  <li>myxml.bookstore.Author.child(1)="toto"-->Not work</li>
  </ul>
  
  <p>Please, can you help me??? Thx a lot!! ;-)</p>
  
  <p>Syme</p>