javascript clone

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js" ></script>
<script type="text/javascript" src="http://www.andresvidal.com/labs/jquery/relCopy.jquery.js" ></script>
<script type="text/javascript">

$(function(){
  var removeLink = '<a class="remove" href="#" onclick="$(this).parent().slideUp(function(){ $(this).remove() }); return false">Delete</a><br><br>';
$('a.add').relCopy({ append: removeLink});
});

function sync()
{
  var test = document.getElementById('test'); // auto increase child id when add more
  var copytest = document.getElementById('copytest'); // auto increase child id when add more
  copytest.value = test.value;


}


</script>

<span class="clone">
<input type="text"  name="test[]" id="test" onkeyup="sync()"> <br>
<input type="text" name="copytest[]" id="copytest" disabled/> <br>



 </span>



 <a href="#" class="add" rel=".clone"> <strong>Add More</strong></a>