<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8">
 </head>
 <body>
  <div>
   <textarea id="right-to-left1" dir="auto" class="testElement">جناع</textarea>
   <input type="text" id="right-to-left2" dir="auto" value="שלום">
  </div>
  <script type="text/javascript">
   var test1=document.getElementById("right-to-left1");
   var test2=document.getElementById("right-to-left2");
   test2.appendChild(document.createTextNode("hello"));
   setInterval(function() {
     test1.appendChild(test2);
     test2.parentNode.removeChild;
     test1.innerHTML="goodbye";
   }, 4);
  </script>
 </body>
</html>
