클릭한 링크 active

<div id="dv">
<ul>
	<li id="dv1" class="active" onclick="javascript:chgOver(1)"><a href="#">1</a></li>
	<li id="dv2" onclick="javascript:chgOver(2)"><a href="#">2</a></li>
	<li id="dv3" onclick="javascript:chgOver(3)"><a href="#">3</a></li>
	<li id="dv4" onclick="javascript:chgOver(4)"><a href="#">4</a></li>
	<div class="clear"></div>
</ul>
</div>
<script language="JavaScript">
function chgOver(num) {
	for(i=1;i<5;i++) {	
		$("#dv"+i).removeClass("active");
	}
	$("#dv"+num).addClass("active");
}
</script>