automatically convert combobox text to capitalized string

Is there a way to automatically convert input string in combobox to capitalized string? for example, if input "first last" then the combobox will display: "First Last"?
Thanks.
<asp:ComboBox ID="ComboBox1" runat="server" AutoCompleteMode="Suggest" ForeColor="Red" Font-Size="14px" Font-Bold="True" DataSourceID="SqlDataSource1" DataTextField="Name" DataValueField="NameID" EnableViewState="False" MaxLength="0" style="display:inline;" Width="86px"></asp:ComboBox>