Private Sub Submit_Click()
Dim strSQL1 As String
Dim strSQl2 As String
Dim strSQL3 As String
DoCmd.SetWarnings (WarningsOff)
strSQL1 = "INSERT INTO Requests (Emp_no, ReqDate, ReqTime) values (Forms!Entry!Empno, Forms!Entry!Calendar0, '14:00');"
strSQl2 = "INSERT INTO Requests (Emp_no, ReqDate, ReqTime) values (Forms!Entry!Empno, Forms!Entry!Calendar0, '18:00');"
strSQL3 = "INSERT INTO Requests (Emp_no, ReqDate, ReqTime) values (Forms!Entry!Empno, Forms!Entry!Calendar0, '20:00');"
If Me.Check1.Value = -1 Then DoCmd.RunSQL strSQL1
If Me.Check2.Value = -1 Then DoCmd.RunSQL strSQl2
If Me.Check3.Value = -1 Then DoCmd.RunSQL strSQL3
DoCmd.SetWarnings (warningsOn)
End Sub