This is a beginners question I think.
I have a table of news items - which are currently listed - each linked to a pop up page that will display the details. Straightforward.
However my client would like to be able to have a previous / next link displayed beneath the details so that the visitor can also nove 'backwards' and 'forwards' through the items without going back to the main list.
For this it seems I would need some code that knows what 'item' is being displayed and be able to call up a link to the 'previous' and 'next' items. The table does contain a 'sortorder' field in which the client enters a number to specify the position of each item in the list. This would seem a natural contender but currently this can be any number they like.