sorry 4 my laziness, scanned codex, and here is the solution
<?php
global $userdata;
get_currentuserinfo();
if ($userdata->user_login!="admin"):
print "<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-42393-3";
urchinTracker();
</script>";
endif;
?>
http://codex.ww.wp.xz.cn/get_currentuserinfo
