function toggleBox(sid,hid) {
	document.getElementById(sid).className="visible";
	document.getElementById(hid).className="invisible";
}

var timeout         = 300;
var closetimer		= 0;
var ddmenuitem      = 0;

function mopen(id) {	
	mcancelclosetime();
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
}
function mclose() {
  if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

function mclosetime() {
  closetimer = window.setTimeout(mclose, timeout);
}

function mcancelclosetime() {
  if(closetimer) {
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

document.onclick = mclose;