function showSubMenu( nId, sShow ) {
    document.cookie = null;
    var obj = null;
    for ( var i = 0; i <= 25; i++ ) {
        obj = document.getElementById("submenu" + i);
        if (obj != null) {
            if (i == nId) {
                if( sShow == "show" ) {
                    obj.style.display = "block";
                    document.cookie = i;
                } else if( sShow == "auto" ) {
                    if (obj.style.display == "none") {
                        obj.style.display = "block";
                        document.cookie = i;
                    } else {
                        obj.style.display = "none";
                        document.cookie = null;
                    }
                }
            } else {
                obj.style.display = "none";
            }
        }
	}
}

function initSubMenus() {
    if (document.cookie) {
        showSubMenu( document.cookie, 'show' )
    } else {
        showSubMenu( 0, 'hide' );
    }
}