[jQuery] number of selected elements

[jQuery] number of selected elements

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
<META content="MSHTML 6.00.6000.16544" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=421401313-24102007><FONT face=Arial size=2>hi
friends,</FONT></SPAN></DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial size=2>a quickie
here:</FONT></SPAN></DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial size=2>say i have a
selector: $('table');</FONT></SPAN></DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial size=2>can someone let me
know the most efficient way to get the number of TR inside the selected
TABLE?</FONT></SPAN></DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial size=2>thanks a
lot!</FONT></SPAN></DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=421401313-24102007><FONT face=Arial
size=2>Alexandre</FONT></SPAN></DIV></BODY></HTML>
<BR>
<P><FONT SIZE=2>Ce message Envoi est certifié sans virus connu.<BR>
Analyse effectuée par AVG.<BR>
Version: 7.5.488 / Base de données virus: 269.15.8/1089 - Date: 23/10/2007 19:39<BR>
</FONT> </P>