[jQuery] Update Text or HTML

[Dave Maharaj :: WidePixels.com]

I have a div inside a div:
 
<div class="heading" id="some_id">Some Title Text
     <div class="manage_options">Add | Edit | Delete</div>
</div>
 
I simply want to change the "Some Title Text" and leave the Add Edit Delete
as is but my
 
<script type="text/javascript">
$(document).ready(function() {
 $('.heading').html("My New Title");
 })
</script> 
 
Strips everything out, how can i select to only change the heading text?
 
Thanks
 
Dave