<label multiline="true">
1. Add timeout-message in zk.xml
<session-config>
    <device-type>ajax</device-type>
    <timeout-message>Session timeout. Please reload.</timeout-message>
</session-config>
2. Wait until session timeout.
3. Focus on textbox, it is bug if see two timeout messages.
</label>
<zk>
    <textbox id="txt" value="test" onFocus='System.out.println("hi focus")' onBlur='System.out.println("hi blur")' />
</zk>