// JavaScript Document
function menu_sub_in(id) {
//document.getElementById('menu_sub_travel').style.display = "block";
	document.getElementById(id).style.display = 'block';
	//menu_sub_travel.style.display = 'block';
} 
function menu_sub_out(id){ 
	//menu_sub_travel.style.display = 'none';
	document.getElementById(id).style.display = 'none';
}