//menus
function ddOpen(ddID){
	document.getElementById(ddID).style.visibility = "visible";
}
function ddClose(ddID){
	document.getElementById(ddID).style.visibility = "hidden";
}
//swicher
function flip(rid) {
current=(document.getElementById(rid).style.display == 'none') ? 'block' : 'none';
document.getElementById(rid).style.display = current;
}
function flip2(rid) {
current=(document.getElementById(rid).style.overflow == 'hidden') ? 'visible' : 'hidden';
document.getElementById(rid).style.overflow = current;
}