var submenu_array = new Array('1','2','3','4','5','6');

	function menu_close(){
		sub_close("");
		return;
	}
	
	function menu_open(menu_name){
		sub_close(menu_name);
		document.getElementById(menu_name).style.display='block';
		return;
	}
	
	function sub_close(none_close){
		for(count in submenu_array){
			if(submenu_array[count] != none_close){
				document.getElementById(submenu_array[count]).style.display='none';
			}
		}
		
		return;
	}