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Display Fields when Checkbox is checked

Hello All,

 On Checkbox field check, I need to display a Date Field and File Upload section.
 When the checkbox is unchecked, i need to remove the Date Field and File Upload Section..

 I have written the below code, which works perfectly when the checkbox is checked.
 When I uncheck the checkbos, it throws the error - "Visualforce Error Help for this Page
apex:inputFile can not be used in conjunction with an action component, apex:commandButton or apex:commandLink that specifies a rerender or oncomplete attribute."

VF Page
<apex:page standardController="Associate__c" extensions="AttachmentUploadController">
<apex:form >

<apex:pageBlock id="tBlock">  
   <apex:outputLabel value="Active" />  
   <apex:inputField value="{!Associate__c.Active__c}">  
      <apex:actionSupport event="onchange" rerender="tBlock"/>  

 Date of Joining <apex:inputField value="{!Associate__c.DOJ__c}" rendered="{!(Associate__c.Active__c == true)}"/>  
     <apex:actionregion >
 <apex:outputLabel value="File" for="file"/>
 <apex:inputFile value="{!attachment.body}" filename="{!attachment.name}" id="file" rendered="{!(Associate__c.Active__c == true)}"/>  

Apex Class

public with sharing class AttachmentUploadController {

    public AttachmentUploadController(ApexPages.StandardController controller) {


public Attachment attachment {
  get {
      if (attachment == null)
        attachment = new Attachment();
      return attachment;

  public PageReference upload() {

    attachment.OwnerId = UserInfo.getUserId();
//    attachment.ParentId = '00190000015ZVLm'; // the record the file is attached to
    attachment.ParentId = ApexPages.currentPage().getParameters().get('id'); 
    attachment.IsPrivate = true;

    try {
      insert attachment;
    } catch (DMLException e) {
      ApexPages.addMessage(new ApexPages.message(ApexPages.severity.ERROR,'Error uploading attachment'));
      return null;
    } finally {
      attachment = new Attachment(); 

    ApexPages.addMessage(new ApexPages.message(ApexPages.severity.INFO,'Attachment uploaded successfully'));
    return null;


Please help.. 
Rahul SharmaRahul Sharma
You cannot rerender a section which has a apex:inputFile component, But you could show hide the Date and Input file field from JavaScript based on checkbox selection.
Hi Rahul,

 Yah, Can you please share me the code snippet / sample code using JavaScript.
 It will be very helpful.

Thanks !!