title: Copy selected text from one textarea to another
body: <p>I have two <code>&lt;textarea&gt;</code>s. One with <code>id="input"</code> and the other with <code>id="selection"</code>. </p>
  
  <p><code>&lt;textarea id="input"&gt;</code> will contain some HTML. The user will select some text in this textarea, click a button and the selected text will be copied to <code>&lt;textarea id="selection"&gt;</code>. </p>
  
  <p>I can use jQuery or just vanilla JavaScript and I'd like it to work in IE7+, Safari and Firefox.</p>