CheckBox Value - Unchecked?

I am trying to get an element to change when a checkbox is checked or unchedcked. I am not sure how to read or get the value of an unchecked checkbox. I can get the results I want when the checkbox is checked, but not unchecked. When the checkbox is unchecked, nothing happens.

Here is the code I am currently playing with:


  <html>
  <head>
  <title>Test Document</title>
 
   <script language="JavaScript" defer="true">
     
       function TestCKBox()
       {
        if(TestForm.TheCheckBox.value == "True")
        {
         TestDataVal.style.display = "";
        }
        else
        {
         TestDataVal.style.display = "none";
        }
       }

   </script>
  <body>

  <form name="TestForm">
  <input type="checkbox" name="TheCheckBox" value="True" onclick="JavaScript:TestCKBox()">The CheckBox
  </form>
  <div id="TestDataVal" style="display:none;">TEST</div>

  </body>
  </html>
LVL 4
swinslowAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

amit_gCommented:
Use checkbox.checked attribute ...

       function TestCKBox()
       {
        if(TestForm.TheCheckBox.checked)
        {
         document.getElementById("TestDataVal").style.display = "block";
        }
        else
        {
         document.getElementById("TestDataVal").style.display = "none";
        }
       }

also use document.getElementById instead of directly accessing the div element.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
jaysolomonCommented:
<html>
 <head>
 <title>Test Document</title>
 
  <script language="JavaScript" defer="true">
       function TestCKBox(fObj,theDiv){
            var el = document.getElementById(theDiv);
        if(fObj.checked == true){
                  el.style.display = "";
            } else {
                  el.style.display = "none";
            }
      }
  </script>
 <body>

 <form name="TestForm">
 <input type="checkbox" name="TheCheckBox" value="True" onclick="TestCKBox(this,'TestDataVal')">The CheckBox
 </form>
 <div id="TestDataVal" style="display:none;">TEST</div>

 </body>
 </html>
0
swinslowAuthor Commented:
amit_g - Thank you very much! That works perfect.

Soren

0
jaysolomonCommented:
swinslow

It does not work in Netscape as mine does.

you will need to modify it to work for NS

0
swinslowAuthor Commented:
Doesnt matter much about Netscape in this application. It for an intranet web site, and Netscape has been permanently banned for a couple years.

Thanks anyway. I will remember that if I need it for one of our internet sites.

Soren

0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
JavaScript

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.