// Show / Hide submenus

function toggle(elem,level) {
	var el = document.getElementById(level);
	var a = el.getElementsByTagName('ul');

	for (i = 0; i < a.length; i++) {
		var b = a[i];
		if (b.id != '' && b.style.display == 'block')
			b.style.display = 'none';
		else
			if (b.id == elem) {
				b.style.display = 'block'
			}
	}
}