Finding again within a filtered list
On entering a perticular layout, a script trigger is initiated that includes a 'Find' to display the records i want to see. Foer example, invoices records. On this layout I have a button to enter find mode for the fields on the list view, so that I can find certain invoices. However, I want the 'find' to just find records within the filtered records available, not the whole lot. How do I achieve this? At the moment, the layout is based on Invoice Details table.