DataList Paging in .NET and C# 3,5

Attached code all works. Change required as follows: Pages should be in blocked of ten the same way Google pages, eg 1,2,3,4,5,6,7,8,9,10 Next --> 11,12,13, etc The code should be changed AS LITTLE AS POSSIBLE. I do not want a re-write. This is important. The entire logic and structure should remain the same for this task with some small changes. This will run on the Web.