Dynamic Menu Based on Decade
I have a db table which contains information from HS yearbooks. One column of the table contains the year. Presently, I dynamically build a submenu containing all of the distinct years from the table. But, the list has now gotten rather long and I want to insert a second level submenu item with the decade. My problem is not building the submenus but rather determining the distinct decades needed.
Here is a link to the present submenu. Select the menu item... Windom Yearbooks and you will see the long list of years.
I would like to have something like this...
Windom Yearbooks >
'40s Yearbooks >
'50s Yearbooks >
Thus, my question relates to how to determine the distinct decades of the years from the db table.
TIA for your assistance