[jQuery] jQuery and Prototype Conflicts

[DaveG]

I'm using prototype and jQ on the same page. I'm using noConflict().
<script src="/javascripts/jquery.js" type="text/javascript"></script>
<script type="text/javascript">
   jQuery.noConflict();
</script>

Everything is happy. Until I use prototypes Ajax.Update(). The response 
is a bunch of javascript calls that include calls to prototype routines, 
like Element.show(). It seems that I need to include a call to 
noConflict() at the start of the response, otherwise $ does not point to 
prototype.

Am I doing something fundamentally wrong here? Why do I need subsequent 
calls to noConflict()?

 ~ ~ Dave