var id_menu = new Array('sub_menu_1','sub_menu_2','sub_menu_3');
 var id_menu_href = new Array('sub_menu_href_1','sub_menu_href_2','sub_menu_href_3');
function allclose() {
	for (i=0; i < id_menu.length; i++){
		document.getElementById(id_menu[i]).style.display = "none";
		document.getElementById(id_menu_href[i]).style.fontSize = "1em";
		document.getElementById(id_menu_href[i]).style.lineHeight = ".5em";
	}
}
function openMenu(id){
	for (i=0; i < id_menu.length; i++){
			if (id != id_menu[i]){
			document.getElementById(id_menu[i]).style.display = "none";
			document.getElementById(id_menu_href[i]).style.fontSize = "1em";
			document.getElementById(id_menu_href[i]).style.color = "#0099cc";
		}
		if (id==id_menu[i]){
		document.getElementById(id_menu_href[i]).style.fontSize = "1.2em";
			document.getElementById(id_menu_href[i]).style.color = "red";}
	}
	if (document.getElementById(id).style.display == "block"){
		document.getElementById(id).style.display = "none";
	}else{
		document.getElementById(id).style.display = "block";
	}
}