Jsf custom component issue

Question

I am creating a custom component and extending the renderer like the following. My custon component is similar to h:messages but inaddition to that it has hyperlink(clicking error focuses individual input box). I have extended the renderer as follows, every thing works fine but the problem is the form gets null or looses its all value when error occured, however the component works fine. I dont know why is that hapening.
Any help would be highly appreciated.
public class CustomErrorRenderer extends Renderer {
@Override
public void encodeEnd(FacesContext context,
UIComponent component) throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.startElement("div", component);
writer.writeAttribute("id", component.getClientId(context), "id");
writer.writeAttribute("style", "color: red", null);
writer.startElement("ul", null);
Iterator<String> clientIds = context.getClientIdsWithMessages();
while (clientIds.hasNext()) {
String clientId = clientIds.next();
Iterator<FacesMessage> messages = context.getMessages(clientId);
if (!messages.hasNext()) { continue; }
String javaScript = "var field = document.getElementById('"
+clientId+ "');" +"if(field == null) return false;"+
"field.focus(); return false;";
writer.startElement("li", null);
writer.startElement("a", null);
writer.writeAttribute("onclick", javaScript, null);
writer.writeAttribute("href", "#", null);
while (messages.hasNext()) {
writer.writeText(messages.next().getSummary(), null);
writer.endElement("a");
writer.endElement("li");
writer.endElement("ul");
writer.endElement("div");
}

Answer 1

The problem is, the form values that are tied to input boxes are null once validation error occurs.
I think when I am overriding that encodeEnd, this is causing the problem for the form values getting null.
IF I want to see, what are the submitted values then isn't this the way, I am getting null here also:
          FacesContext context = FacesContext.getCurrentInstance();     
              UIViewRoot viewRoot= context.getViewRoot();
             HtmlInputText input = (HtmlInputText)viewRoot.findComponent("formId:InputboxId");
          System.out.println("input  sub value" + input.getSubmittedValue());