I need to make a radio button mandatory on this html form

Hi

I have a form, I have made a checkbox mandatory and an alert comes up if it is not ticked.
I would like to do the same for a radio button (choice of 5) but cannot seem to get it to work.

thanks.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script type="text/javascript">
// <![CDATA[
function validate(frm) {
if (frm.checkbox.checked==false)
{
alert("You must read and consent to our privacy policy to send this form.");
return false;
}
}
// ]]>
</script>
</head>
<body>
<form method="POST" action="captcha.php" onSubmit="return validate(form);" name="form"> 
<textarea name="user_comments" cols="75" rows="5" id="user_comments"></textarea>
</p>
<p align="left" class="bold">Where did you hear
  about us?*</p>
<p align="left">
  <input type="radio" name="source" id="source" value="radio1">
  General Internet Search</p>
<p align="left">
  <input type="radio" name="source" id="source" value="radio2">
  Online  'Find a Financial Adviser'
  
  Directory via 'unbiased.co.uk.'</p>
<p align="left">
  <input type="radio" name="source" id="source" value="radio3">
  Nursing Home Database (ucarewecare.com)</p>
<p align="left">
  <input type="radio" name="source" id="source" value="radio4">
  Care Provider (please state which one)
  <input name="care_provider_source_is" type="text" id="radio4_source_is" size="55" maxlength="55">
</p>
<p align="left">
  <input type="radio" name="source" id="source" value="radio5">
  Other (please state):
  <input name="other_source_is" type="text" id="radio5_source_is" size="75" maxlength="75">
</p>
<p class="bold">Please press the buttons below
  to confirm that you have read our <a href="#privacypolicy">privacy
  policy</a><br>
  and to submit
  your request. </p>
<p align="left"><span class="bold">
  <input type="checkbox" name="checkbox" id="checkbox" value="1">
  </span>I/We have read and consent to your privacy policy*</p>
<p align="left" class="smalltext">The fields marked * are mandatory.</p>
<table width="549" class="bigone">
  <tr class="style1">
    <td colspan="2" align="center"> Ready ? Ok, but before you click 'Send Form' please insert the same letters and numbers you see in the image on the left into the box on the right.<br /></td>
  </tr>
  <tr class="style1">
    <td width="267" align="center"><p> <img src="captcha_image.php" /></td>
    <td width="270" align="center"><input type="text" name="captcha_input" size="15"></td>
  </tr>
</table>
<p>
  <input type="submit" name="submit" value="Please Press Here to Submit Your Request">
</body>
</html>

Open in new window

sp0ttaAsked:
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.

JohnSixkillerCommented:
Hi, you have 2 options. The easy way is to make some default selection by adding "checked" to html radio.

To javascript check:
var rbs = document.getElementsByName("source");
var isOK = false;
for(var i=0; i<rbs.length; i++){
  if(rbs[i].checked){
     isOK = true;
     break;
  }
}
if(!isOK) alert("Select something.");

Open in new window

0
sp0ttaAuthor Commented:
Hi

I would prefer to make sure the checked button was chosen by the user.

thanks
0
JohnSixkillerCommented:
So add my code to your function:
function validate(frm) {
  if (frm.checkbox.checked==false){
   alert("You must read and consent to our privacy policy to send this form.");
   return false;
  }
  var rbs = document.getElementsByName("source");
  var isOK = false;
  for(var i=0; i<rbs.length; i++){
   if(rbs[i].checked){
     isOK = true;
     break;
   }
  }
  if(!isOK){
    alert("Select something.");
    return false;
  }
 
}

Open in new window

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
sp0ttaAuthor Commented:
Perfect, quick and easy

thanks.
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
Web Development

From novice to tech pro — start learning today.