[jQuery] something missing from my code?

Hey guys, Im new to Javascript and JQuery, I am trying to have a
"featured" area on the front page to my site, basically there is a
right div area which holds the picture, on the left there is a menu
with 4 buttons. here is the html:

<div id="projectmenu">

<ul id="projMenu">

<li><a class="projOne" title="Project1"></a></li>
<li><a class="projTwo" title="Project2"></a></li>
<li><a class="projThree" title="Project3"></a></li>
<li><a class="projFour" title="Project4"></a></li>
</ul>
</div>
<div class="project" id="project1"></div>
<div class="project" id="project2"></div>
<div class="project" id="project3"></div>
<div class="project" id="project4"></div>

</div>

Here is the way im setting up the JQuery to try and make the active
div change when I choose a button:

$(function() {
$('a projTwo').click(function() {
$('#project1').css('display','none');
$('#project2').css
('display','');

});
});

does anyone see where I am going wrong? when I get into the CSS
portion will it have to go all the way back like how css is written?
meaning in order to identify it, would it have to be #container
#project1 or will just #project1 work?

thank you in advance