function toggleMenu(id) {
	var className = "";
    menuId = id.substring(4,id.length);
    if (document.getElementById('submenu'+menuId).style.display == "none") {
    	className = document.getElementById(id).className;
    	className = "folder_hide" + className.substring(11,className.length);
    	
    	document.getElementById(id).className = className;
    	document.getElementById('submenu'+menuId).style.display = "block";
    } else {
    	className = document.getElementById(id).className;
    	className = "folder_show" + className.substring(11,className.length);
    	
    	document.getElementById(id).className = className;
        document.getElementById('submenu'+menuId).style.display = "none";
    }
}