UL LI Selector

UL LI Selector

Hello,
I am newbie to jquery. tried to search through the posts, but could not find a solution to this. hence posting.

1. HTML

    <div id="content">
<ul id="sub_navigation">
<li id="find"><a href="#">We Help Potential Clients Find You.</a></li>
<li id="login"><a href="#">Login</a></li>
</ul>
    </div>

2. I need to select the login from Java script and when clicked . need to display a pop-up login box.

I am not able to select the specific (#content #sub_navigation li ) login ... to put a pop-up.

when I do   $('#content #sub_navigation li').hover(function(){
alert('found')
});

It gives a pop-up. how do I choose SPECIFIC login link and not all sub_navigations?

Thanks