checking for sorted pages

I'm wondering if anyone can help me think of a way to add a noindex  
metatag to pages with the sort=hits, title, ratings, etc. in the url.  
I don't need these pages in any search engine index. So far I've  
thought to use xarservergetcurrenturl and then compare that value to  
something containing the sort parameters. I don't think Xaraya has a  
"like" operator in the xar:if conditionals, unless I'm mistaken. It  
would be cool to test the current page's url against some thing like  
"if current url contains "sort=hits", then add the meta tag." To do  
this from the theme's header block would be ideal, but I can't figure  
out how to check to see if a sorted page can have the tag added to it.

Any help would be most appreciated.

-- 
Tim Stalker
<a href="http://www.wiseheat.com">test</a>