JQuery Tooltips

Pullo provided great help to me earlier on tooltips and I’m now using JQuery tooltips.

Here is the code for one of my tips:

<script>jQuery('#main_wrapper').html(jQuery('#main_wrapper').html().replace(/(IT)/g,'<a href="#" class="normalTip" title="Incubation Temperature (IT)">$1</a>'));</script>

My issue is this: This tip also appears in the middle of the word “CITES” instead of just where “IT” appears. How can I limit the tip to exact matches?