select one menu item It display some comment and one inputtextbox

Hi
I am new to richfaces, I created one drop down box using selectOneMenu, creating upto drop down box is ok but the problem is , If i select any item from the drop down box at the same time i should display display one comment and one input text box, for others. please find the code below, thank u.

xhtml:
-------
<h:outputText styleClass="formFont" value="Academic Qualification"></h:outputText>
</h:column>
<h:column>
<a4j:region>
<h:selectOneMenu styleClass="formColumnInputText" required="true" value="title" >
<f:selectItem itemValue=" " itemLabel=" "/>
<f:selectItem itemValue="Secondary Level" itemLabel="Secondary Level"/>
<f:selectItem itemValue="Degree Level" itemLabel="Degree Level"/>
<f:selectItem itemValue="Post Graduate" itemLabel="Post Graduate"/>
<f:selectItem itemValue="Others" itemLabel="Others" />
<a4j:support event="onchange" action="#

{uiRenderer.updateView()}

" reRender="ot1" ajaxSingle="true" />
</h:selectOneMenu>
</a4j:region>
</h:column>
<h:column>
<a4j:outputPanel id="ot1" rendered="#

{uiRenderer.visible}

" >
<h:outputText value="If Others(Please specify here)"/>
<h:inputText value=" " ></h:inputText>
</a4j:outputPanel>

seam class file:
----------------

package com.manam.mortgage.session;

import org.jboss.seam.annotations.Name;

@Name("uiRenderer")
public class UIRenderUtil {

private String listValue;
private boolean visible;
public void updateView()

{ System.out.println("Visible Value" +visible); System.out.println("Method Called. 34...... "); this.setVisible(true); }

public boolean isVisible()

{ return visible; }

public void setVisible(boolean visible)

{ System.out.println("Method Visible Called"); this.visible = visible; System.out.println("Visible Value" +visible); }

public String getListValue()

{ return listValue; }

public void setListValue(String listValue)

{ this.listValue = listValue; }

}