jquery를 이용한 온오프

<meta http-equiv="Content-Type" content="text/html; charset=euc-kr">
<title></title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script type="text/javascript">
function search_box(target){
if($("." + target).hasClass("none")){
    $("." + target).removeClass("none");
} else{
    $("." + target).addClass("none");
}
}
</script>
<style type="text/css">
.none {display:none; }
</style>


<div class="search_list">
    <ul>
        <li><a href="#"><span>테스트</span>1</a></li>
        <li><a href="#">테스트2</a></li>
        <li><a href="#">테스트3</a></li>
    </ul>
</div>
<p class="close"><a href="#" onclick="search_box('search_list'); return false;"><img src="../images/common/btn_close2.gif" alt="닫기"></a></p>