I have a form with a number of fields before a RadMaskedTextBox and a number of fields after. In Chrome or Opera, when the focus is placed on the RadMaksedTextBox, the validation must pass, or you cannot tab or click out of the field, which is not the expected behavior. Here is an example exhibiting this behavior.
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div> <telerik:RadScriptManager ID="RadScriptManager1" AjaxFrameworkMode="Enabled" runat="server" CompositeScript-ScriptMode="Auto" EnableEmbeddedjQuery="False" LoadScriptsBeforeUI="False" OutputCompression="AutoDetect"></telerik:RadScriptManager> <telerik:RadMaskedTextBox ID="txtSSN4" class="numeric" PromptChar="" SelectionOnFocus="SelectAll" runat="server" Width="44px" MaxLength="4" Mask="####" DisplayMask="****" DisplayText="" TabIndex="4" meta:resourcekey="txtSSN4Resource1" HideOnBlur="True" AutoCompleteType="Disabled"> </telerik:RadMaskedTextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" Text="*" ForeColor="Red" ControlToValidate="txtSSN4" ErrorMessage="SSN4 is required." meta:resourcekey="RequiredFieldValidator3Resource1" SetFocusOnError="True"></asp:RequiredFieldValidator> <asp:RegularExpressionValidator runat="server" meta:resourcekey="SSN4RangeValidatorResource1" ID="SSN4RangeValidator" ForeColor="Red" ControlToValidate="txtSSN4" Text="Format is incorrect." ErrorMessage="SSN4 format is incorrect." ValidationExpression="[0-9]{4}" SetFocusOnError="True"></asp:RegularExpressionValidator> <asp:TextBox runat="server" ID="abc"></asp:TextBox> </div> </form></body></html>