You must create a default Dw recordset and with this extension you can display a random sorted fields. Each time the user open the page the extension get a different set of sorted records from your recordset.
Documentation:
http://www.dwzone-it.com/Extension/PhpRandomSort/default.asp
Ui-Access
Server Behaviors >> DwZone >> Random Sort Recordset
Support:
http://forum.dwzone-it.com