I’m not 100% sure I understand what you mean, but the function you refer to is only used for the empty field validation and will auto-hide if you try to call it when there are no elements in the page with the class “dffs_emptyRequired”. This means you can fool it by adding an element in the page with this class – for example in your validation message and then call the function like this:
spjs.dffs.dffs_statusBanner("Label", "Inner text");
Alexander