DocLinks in a NotesRTField

I have a Notes program that distributes documents to be read by the recipients. The form contains a RichText Field that contains document links to a document library. This field may contain 20 or so links at any one time. My problem is that when the users get the document and start clicking on the links to read the doclink documents, there is no way for them to know which document has been read and which has not. Is there any way to accomplish this or is there a better design that I could implement that might allow me to do this. The way it is right now, it works really well, with the exception of not being able to tell which doclink has been used. If there was a click event for the doclink Icon, I could trap on it and change the color of the link text to indicate that it has been read, but there is no such event.

Any help/suggestion/examples would be greatly appreciated.

Thanks in advance,

MJ