if (document.getElementById){ 
	document.write('<style type="text/css">\n')
	document.write('.subnav{display: none;}\n')
	document.write('</style>\n')
}

function togglenav(obj){
	if (document.getElementById) {
		var menu = document.getElementById(obj);
		var subnavs = document.getElementById("navigation").getElementsByTagName("span"); 
		if (menu.style.display != "block") { 
			for (var i=0; i<subnavs.length; i++) { if (subnavs[i].className=="subnav") { subnavs[i].style.display = "none"; } }
			menu.style.display = "block";
		} else {
			menu.style.display = "none";
		}
	}
}