enable or disable a button

I have a button which should be enable or disabled based on the property say prop_check it can have value 'ren' 'ren-pend' 'rene' 'notren'

if the value of property is ren or ren-pen then i need to disable and if it is rene or notren then i should enable

i won't be able to do logic: equal or any of the logic tags since i need to check for two values.

can some one help me how to do this.

thanks

[436 byte] By [SubhaMania] at [2007-11-27 9:03:27]