<group colspan="2" col="2" name="delay">
<separator string="Delays" colspan="2"/>
<field name="sale_delay" attrs="{'readonly':[('sale_ok','=',0)]}"/>
<group colspan="2" col="2" name="delay">
<separator string="Delays" colspan="2"/>
<field name="sale_delay" attrs="{'readonly':[('sale_ok','=',0)]}"/>