//¿À¸¥Âʸ¶¿ì½º ¹æÁö

function noRightMenu() {
    try {
        if ( top.viewMenu == true ) {
            return true;
        } else {
            return false;
        }
    } catch ( e ) {}

    return true;
}

document.oncontextmenu = noRightMenu;