Pulling the value of a CKEditor instance with JavaScript

You should probably read the documentation concerning Integration because it has this example:

Documentation wrote:
Client Side Data Handling

Some applications (like Ajax applications) need to handle all data at the client side, sending it to the server by its own ways. In such case, it's enough to use the CKEditor API to easily retrieve an editor instance data. For example:

<script type="text/javascript">
   var editor_data = CKEDITOR.instances.editor1.getData();
</script>

I am trying to get the data on keypress and update the .html value of a div on the same page using the same method, but I can't do it without a post event.

Is this because the iframe content is not loaded in time? I should mention I am using jQuery.