I have asp.net textbox with MaskedEditExtender.

I set ClearTextOnInvalid property to ture so when invalid text is entered should clear the text.

in my case I have mask=(999)999-9999, when I enter forexample 4 number should then the focus lost should clear the text because i did not enter complete number that fit the mask??

what I want to clear the text when the focus lost if no complete number has entered!!

here is my code:

 <asp:TextBox ID="txtHomePhone" runat="server" Style="top: 147px; left: 543px; position: absolute;
                    height: 22px; width: 128px" ></asp:TextBox>






                <cc1:MaskedEditExtender ID="txtHomePhone_MEE" runat="server" 
                    CultureAMPMPlaceholder="" CultureCurrencySymbolPlaceholder="" 
                    CultureDateFormat="" CultureDatePlaceholder="" CultureDecimalPlaceholder="" 
                    CultureThousandsPlaceholder="" CultureTimePlaceholder="" Enabled="True" 
                    Mask="(999)999-9999" TargetControlID="txtHomePhone" AutoComplete="False" 
                    ClearMaskOnLostFocus="true"
                    ClearTextOnInvalid="True">
                </cc1:MaskedEditExtender>