Multiple fields in WebRFC / OR Condition when using IF for scripting

Hello all,

I know we can use Webrfc . I followed the following link to achieve it. http://scn.sap.com/docs/DOC-35565

The question is, I am creating a Sales Order by caching lot of tabs into 1. I want to check the In-completion log before hitting SAVE using webrfc and giving message to the user.

Basically, when the user hits SAVE button, I want to call webrfc for the fields which are part of incompletion log and check if they are populated, if not, then give a message else call SAVE.

Is it possible to call webrfc only once and pass all the incompletion fields to check.

The other option is to use IF condition on those incompletion fields which will not need any webrfc call but again, I did not see a place where i can use OR conditions for multiple fields in the same IF statement.

Any help is highly appreciated.

Regards,

Salil