 the
         error indicator, thinking that the page simply is not functional. Per the definition in WCAG 2.0, an "input error" is information provided by the user
         that is not accepted. This includes: 
      </p>
      
      <ul>
         
         <li>information that is required by the web page but omitted by the user, or</li>
         
         <li>information that is provided by the user but that falls outside the required data
            format or allowed values.
         </li>
         
  