DIV下拉式菜单(一)(2) while (el!=null) {iPos+=el["offset" + sProp] el = el.offsetParent} return iPos} function show(el,m) {if (m) {m.style.display=' '; m.style.pixelLeft = getPos(el,"Left") m.style.pixelTop = getPos(el,"Top") + el.offsetHeight} if ((m!=cm) && (cm)) cm.style.display='none' cm=m } </SCRIPT>