[TYPO3-english] Compare two fields on Flexforms

[Sergio]

Hi list,

more stuff with Flexforms (sorry, I'm still a newbie). I've got these two
selectbox fields:

                    <settings.ratingMinimum>
                        <TCEforms>

<label>LLL:EXT:my_extension/Resources/Private/Language/locallang_db.xml:flexform.listViews.ratingMinimum</label>
                            <config>
                                <type>select</type>
                                <items>
                                    <numIndex index="0">
                                        <numIndex index="0"></numIndex>
                                        <numIndex index="1"></numIndex>
                                    </numIndex>
                                    <numIndex index="1">
                                        <numIndex index="0">0</numIndex>
                                        <numIndex index="1">0</numIndex>
                                    </numIndex>
                                    <numIndex index="2">
                                        <numIndex index="0">1</numIndex>
                                        <numIndex index="1">1</numIndex>
                                    </numIndex>
                                    <numIndex index="3">
                                        <numIndex index="0">2</numIndex>
                                        <numIndex index="1">2</numIndex>
                                    </numIndex>
                                </items>
                            </config>
                        </TCEforms>
                    </settings.ratingMinimum>
                    <settings.ratingMaximum>
                        <TCEforms>

<label>LLL:EXT:my_extension/Resources/Private/Language/locallang_db.xml:flexform.listViews.ratingMaximum</label>
                            <config>
                                <type>select</type>
                                <items>
                                    <numIndex index="0">
                                        <numIndex index="0"></numIndex>
                                        <numIndex index="1"></numIndex>
                                    </numIndex>
                                    <numIndex index="1">
                                        <numIndex index="0">0</numIndex>
                                        <numIndex index="1">0</numIndex>
                                    </numIndex>
                                    <numIndex index="2">
                                        <numIndex index="0">1</numIndex>
                                        <numIndex index="1">1</numIndex>
                                    </numIndex>
                                    <numIndex index="3">
                                        <numIndex index="0">2</numIndex>
                                        <numIndex index="1">2</numIndex>
                                    </numIndex>
                                </items>
                            </config>
                        </TCEforms>
                    </settings.ratingMaximum>

I would like to know if there is a way to ckeck "ratingMinimum" <=
"ratingMaximum" before saving.

Thanks in advance,
Sergio