Protected Sub Page_Load(ByVal S As Object, ByVal E As System.EventArgs)
        Dim cusID As String = Trim(Request.QueryString("cusID"))
        Dim conID As String = Trim(Request.QueryString("conID"))

        if Not cusID Is Nothing and Not conID Is Nothing and Len(cusID) > 1 and Len(conID) > 1 then
            DropDownList1.Items.FindByValue(cusID).Selected = True
            RaiseEvent DropDownList1_SelectedIndexChanged(DropDownList1, e)

            DropDownList2.Items.FindByValue(conID).Selected = True
            RaiseEvent DropDownList2_SelectedIndexChanged(DropDownList2, e)
        end if
    End Sub