function DropMenu(sender, dropObj, selected) {
	var dropObj = document.getElementById(dropObj);
	if(!dropObj) { return; }
	var top=sender.offsetTop;
	var left=sender.offsetLeft;
	while(sender=sender.offsetParent) { top+=sender.offsetTop; left+=sender.offsetLeft; }
	dropObj.style.top=top+20;
	dropObj.style.left=left-1;
	dropObj.style.visibility = 'visible';
	return true;
	}

function HideMenu(sender, dropObj, selected) {
	var dropObj = document.getElementById(dropObj);
	if(!dropObj) { return; }
	dropObj.style.visibility = 'hidden';
	return true;
	}