<!--

lastTopMenuObj = '';

function switchTopMenu(obj) {

	if (lastTopMenuObj) {

		closeTopMenu(lastTopMenuObj);

	}

	var objName = obj.getAttribute('chapter');

	var table_1 = document.all['top_menu_' + objName + '_menu'];
	var table_2 = document.all['top_menu_' + objName + '_submenu'];

	if (!table_1) {

		return;

	}

	if (table_1.style.visibility != 'hidden') {

		closeTopMenu(obj);

		return;

	}

	obj.style.visibility = 'hidden';

	table_1.style.visibility = 'visible';
	table_2.style.visibility = 'visible';

	lastTopMenuObj = obj;

}



function closeTopMenu(obj) {

	var objName = obj.getAttribute('chapter');

	table_1 = document.all['top_menu_' + objName + '_menu'].style.visibility = 'hidden';
	table_2 = document.all['top_menu_' + objName + '_submenu'].style.visibility = 'hidden';

	obj.style.visibility = 'visible';

}

//-->