if ( parent.rptTop )
{
    if ( (parent.rptTop.bLoaded) && (parent.rptTop.HideLoadingWindow) )
        parent.rptTop.HideLoadingWindow();
}
else if ( (parent.parent) && (parent.parent.rptTop) )
{
    if ( (parent.parent.rptTop.bLoaded) && (parent.parent.rptTop.HideLoadingWindow) )
       parent.parent.rptTop.HideLoadingWindow();
}