field(subscribe,yes)
select(X,Y) & ~matches(Y,"^\s*$") ==> field(X,Y)
select(X,Y) & field(X,Z) ==> ~field(X,Z)
deselect(X,Y) ==> ~field(X,Y)
value(X,Y) :- field(X,Y)
holds(X,Y) :- field(X,Y)
style(ok(X),display,"") :- field(X,Y)
style(ok(X),display,"none") :- countofall(Y,field(X,Y),0)
innerhtml(newuser,X) :- field(name,X)
style(welcome,display,"") :- somename
style(welcome,display,"none") :- ~somename
somename :- field(name,X)
field(msgtype,Z) :- worksheetanchor(Z)
okay :- field(name,X) & field(email,Y)% & field(message,Z)
click(send) & okay ==> ok
click(send) & ~okay ==> ~ok
