<script>
function SubMenu,SubMenu2(obj,type) {
var obj
var div = eval("document.all." + obj);
if(type=='open'){div.style.top = event.y -10 ;div.style.left = event.x -5 ;div.style.display = "block";}
else if (type == 'over') {div.style.display = "block";}
else if (type == 'out') {div.style.display = "none";}
}
</script>
<a href="#" onMouseOver="javascript:SubMenu('oracle_pop20080926','open')" onMouseOut="javascript:SubMenu('oracle_pop20080926','out')"><b><center>MAIN PAGE</b></font></a>
<div id='oracle_pop20080926' style='display:none;position:absolute;filter:alpha(opacity=100)' onMouseOver="javascript:SubMenu('oracle_pop20080926','over')" onMouseOut="javascript:SubMenu('oracle_pop20080926','out')">
<table border='0' cellpadding='5' cellspacing='0' width=150>
<tr><td><a href="#">이런거 들어가남;;</a></td></tr>
</table>
</div>
position:absolute;left:50%;top:192px;margin-left:-200px;
가운데 정렬을 하고자 하면 left를 50%로 처리 후 margin-left:-200px 을 조정하면 가운데 처리가 가능하다.