If( currentID = LBound(articles) ) Then
	Dim previous as String = 'Previous'
	Dim next as String = '<a href="yourpage.aspx?id=1">Next</a>'
Else
	If ( currentID = UBound(articles) ) Then
		Dim previous as String = '<a href="yourpage.aspx?id=' & (UBound(articles)-2) & '">Previous</a>'
		Dim next as String = 'Next'
	Else
		Dim previous as String = '<a href="yourpage.aspx?id=' & (currentID-2) & '">Previous</a>'
		Dim next as String = '<a href="yourpage.aspx?id=' & (currentID) & '">Next</a>'
	End If
End If