function submenudisplay(submenuid) {
	submenu = document.getElementById(submenuid);
	if(submenu!=null) {
		if (submenu.style.display == "block") {
			submenu.style.display = "none";
		} else {
			submenu.style.display = "block";
		}
	}
}

var lastid = new Array();
var level = 0;

function submenupop(submenuid,level) {
	for (i=level; i<lastid.length; i++) {
		if (lastid[i]) {
			document.getElementById(lastid[i]).style.visibility = "hidden";
		}
	}
	if (submenuid != '') {
		submenu = document.getElementById(submenuid);
		submenu.style.visibility = "visible";
		lastid[level] = submenuid;
	}
}

// posim start
var menu = new Array('product_description', 'tech_specs');
function toggleMenu(divID) {
	for (i=level; i<menu.length; i++) {
		document.getElementById(menu[i]).style.display = "none";
	}
	document.getElementById(divID).style.display = "block";
}
// posim stop