JQuery Datepicker z-index issue

JQuery Datepicker z-index issue


I'm working on a plugin for WordPress that uses the
jquery.ui.datepicker library. I'm using jquery.ui.tabs & Thickbox on
the same page. Everything's been working, but I found a problem with
the date picker.
Essentially, the page has 3 tabs. On one tab, the user can click on a
link & a Thickbox dialog is displayed. This dialog has 3 fields in it
that are mapped to the datepicker via their class name.
What's happening is the datepicker is opening up underneath the
Thickbox dialog box. I can see the last line or so of it peeking out
from under the dialog box.
How do I bring the datepicker on top of the thickbox dialog box?
Thanks
Tony