function menu_link(menu_link) {
	if(menu_link == "menu_01") window.open('/child/intro_010101.do', '_self');
	if(menu_link == "menu_01_01") window.open('/child/intro_010101.do', '_self');
	if(menu_link == "menu_01_02") window.open('/child/intro_0102.do', '_self');
	if(menu_link == "menu_01_03") window.open('/child/intro_0103.do', '_self');
	if(menu_link == "menu_01_04") window.open('/child/intro_0104.do', '_self');
	
	if(menu_link == "menu_02") window.open('/child/work_0101.do', '_self');	
	if(menu_link == "menu_02_01") window.open('/child/work_0101.do', '_self');
	if(menu_link == "menu_02_02") window.open('/child/work_0102.do', '_self');
	if(menu_link == "menu_02_03") window.open('/child/work_0103.do', '_self');
	if(menu_link == "menu_02_04") window.open('/child/work_0104.do', '_self');

	if(menu_link == "menu_03") window.open('/child/history_0102.do', '_self');
	if(menu_link == "menu_03_02") window.open('/child/history_0102.do', '_self');
	if(menu_link == "menu_03_03") window.open('/child/history_010301.do', '_self');
	if(menu_link == "menu_03_04") window.open('/child/history_0104.do', '_self');
	if(menu_link == "menu_03_05") window.open('/child/history_0105.do', '_self');
	if(menu_link == "menu_03_06") window.open('/child/history_0106.do', '_self');

	if(menu_link == "menu_04") window.open('/child/info_0101.do', '_self');
	if(menu_link == "menu_04_01") window.open('/child/info_0101.do', '_self');
	if(menu_link == "menu_04_02") window.open('/child/info_0102.do', '_self');
	if(menu_link == "menu_04_03") window.open('/child/info_0103.do', '_self');
	if(menu_link == "menu_04_05") window.open('/child/info_010501.do', '_self');
	if(menu_link == "menu_04_06") window.open('/child/info_0106.do', '_self');

	if(menu_link == "menu_05") window.open('/child/council_010101.do', '_self');

	if(menu_link == "menu_06") window.open('/child/library_010101.do', '_self');
}