[jQuery] tutorial code doesn't work :-(

[jQuery] tutorial code doesn't work :-(


hi,
I am relatively new in jquery.I just installed and was sailing thru
tutorial.But somehow i was not able to run following code
$("a")
.filter(".clickme")
.click(function(){
alert("You are now leaving the site.");
})
.end()
.filter(".hideme")
.click(function(){
     alert('hide');
$(this).hide();
return false;
})
.end();
------------
html
<a href="http://google.com/" class="clickme">I give a message when
you leave</a><br/>
<a href="http://yahoo.com/" class="hideme">Click me to hide!</a><br/>
<a href="http://microsoft.com/">I'm a normal link</a><br/>
i installed the latest version.
Can someone explain where i might be missing.
Regards,
Priti