function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}

function showSubMenu() {
var linkObj = document.getElementById("Base");
var obj = findPos(linkObj);
var curLeft = obj[0];
var curTop = obj[1];
var obj2 = document.getElementById("subMenu");
obj2.style.marginLeft = curLeft;
obj2.style.marginTop = curTop;
obj2.style.display = "Block";

}