Two Masks in one MaskedEditExtender?

Wanting to use the following two telephone number masks in one MaskedEditExtender: Mask="99999 99999" and Mask="99999 999999"

Therefore, can you combine two masks into one MaskedEditExtender mask?

Got one mask working in the following code snippet.

<asp:TextBox ID="tbPhone" runat="server" /><ajaxControlToolkit:MaskedEditExtender runat="server" ID="meePhone" TargetControlID="tbPhone" Mask="99999 99999" ClearMaskOnLostFocus="true" MaskType="Number" />