function CheckAll( objAll ) {
    for ( var i = 0; i < document.f.length; i++ ) {
        document.f[ i ].checked = objAll.checked;
    }
}

function CheckOne( objOne ) {
    if ( objOne.checked == false ) {
        document.f.chk.checked = false;
        return;
    }
    for ( var i = 0; i < document.f.length; i++ ) {
        if ( document.f[ i ].checked == false && document.f[ i ].name != "chk" ) {
            return;
        }
    }
    document.f.chk.checked = true;
}