title: can not execute tags in text enter text area element
body: <p>I use HTML5 and textara element. 
   I write funcation by javascript to put string in textara element :</p>
  
  <pre><code>var textBoxPacket = document.getElementById("TextArea1");
  textBoxPacket.innerHTML = textBoxPacket.innerHTML +"&lt;br&gt;" +"You say: &lt;strong&gt;" + TxtSend.value + "&lt;/strong&gt;";
  </code></pre>
  
  <p>my problem is : the HTML tags don't execute . the browser show them text and dont execute them . what is problem </p>