From the Support.microsoft.com site (I've used this and it works)
To create the data access page and the appropriate script to find a selected record, follow these steps:
1. Open the sample database Northwind.mdb.
2. In the Database window, click Pages under Objects, and then double-click Create data access page by using wizard.
3. Under Tables/Queries, click the arrow, and then click Table: Customers in the list.
4. Click >> to move all the fields from the Available Fields list to the Selected Fields list.
5. Click Finish.
6. In the toolbox, click Dropdown List, and then click anywhere on the page to add the Dropdown List control.
7. Set the following properties for the Dropdown List control:
ID: CustID
ListRowSource: Table: Customers
ListBoundField: CustomerID
8. Right-click anywhere on the page, and then click Microsoft Script Editor on the shortcut menu to open the HTML source.
9. On the View menu, point to Other Windows, and then click Script Outline. This places the focus in the Script Outline window pane, at the top-most node that is labeled Client Objects & Events. Expand Client Objects & Events, expand CustID, and then double-click the onchange event.
10. Insert the following script:<SCRIPT LANGUAGE=vbscript FOR=CustID EVENT=onchange>
<!--
Dim rs
Set rs = MSODSC.DefaultRecordset
rs.Find "[CustomerID] = '" & document.all.item("CustID").value & "'", 0, 1, 1
'0 = Skip zero records before starting the search.
'1 = Search in a forward direction.
'1 = Always begin the search with the first record in the recordset.
-->
</SCRIPT>
NOTE: To search for numeric data, change the command line in the script as follows:
rs.Find "[CustomerID] = " & document.all.item
"CustID").value
11. Save the page as Page1.htm, and then click Page View on the View menu.
12. Click a value in the CustID drop-down list to move the data access page to that record.
Me again, next to the rs.Find is where you put in your selection criteria. SQL!