menuList = ["pdMENU1","pdMENU2","pdMENU3"];
function pulldownmenu(mObj)
{
	pdMENU = getMenuObj(mObj);
	flag = pdMENU.style.visibility;
	for (i=0; i<menuList.length; i++)
	{
		pdMENU = getMenuObj(menuList[i]);
		pdMENU.style.visibility = "hidden";
	}
	pdMENU = getMenuObj(mObj);
	if (flag == "visible") pdMENU.style.visibility = "hidden"; else pdMENU.style.visibility = "visible";
}
function getMenuObj(obj)
{
	if (document.all) return document.all(obj);
	if (document.getElementById) return document.getElementById(obj);
	return obj;
}