Help with active link sprite nav

I've got to be doing something wrong.  I have a nav sprite that has a a, a:hover, and a.selected state.  What am I doing incorrect?

$('navlist a').click(function() {
    $('navlist a').removeClass('selected');
    $(this).addClass('selected');
}

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my html

<ul id="navlist">
							 <li id="home"><a  class="nav" href="/home/" ${page == '/home/' ? 'class="active"' : ''}"></a></li>
							  <li  id="about" class="nav"><a  href="/about-us/" ${page == '/about-us/' ? 'class="active"' : ''}"></a></li>

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and my css:

#home a:link { background: url(images/nav-sprite.png) no-repeat -16px 0; width: 78px; height: 66px; }
#home a:hover { background: url(images/nav-sprite.png) no-repeat -16px -66px; width: 78px; height: 66px; }
#home a.nav:active, a:focus { background: url(images/nav-sprite.png) no-repeat -16px -132px; width: 78px; height: 66px; }
#home a.active { background: url(images/nav-sprite.png) no-repeat -16px -132px; width: 78px; height: 66px; }

#about a:link { background: url(images/nav-sprite.png) no-repeat -101px 0; width: 94px; height: 66px; }
#about a:hover { background: url(images/nav-sprite.png)  no-repeat -101px -66px; width: 94px; height: 66px; }
#about a:active { background: url(images/nav-sprite.png) no-repeat -101px -132px; width: 94px; height: 66px; }
#about a.active { background: url(images/nav-sprite.png) no-repeat -101px -132px; width: 94px; height: 66px; }

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Please let me know what i'm doing wrong