function toggleMenu(idx,labl) {
  idx = typeof(idx)=="string" ? document.getElementById(idx) : idx;
	labl = typeof(labl)=="string" ? document.getElementById(labl) : labl;
	if( idx && labl )
	{
  	if(/\bcloseSubMenu\b/.test(idx.className) )
		{
			labl.className = labl.className.replace(/\bopenMenuLabel\b/,"closeMenuLabel");
			idx.className = idx.className.replace(/\bcloseSubMenu\b/,"openSubMenu");
		}
		else if(/\bopenSubMenu\b/.test(idx.className) )
		{
			labl.className = labl.className.replace(/\bcloseMenuLabel\b/,"openMenuLabel");
			idx.className = idx.className.replace(/\bopenSubMenu\b/,"closeSubMenu");
		}
	}
	else if( !idx )
	{
		alert("Supplied idx argument may not be an existing element node, id or your browser has no DOM support.");
	}
	else if( !lbl )
	{
		alert("Supplied lbl argument may not be an existing element node, id or your browser has no DOM support.");
	}
}