Validate Radio Buttons in Javascript

Question

I am trying to validate some radio buttons using Javascript but I could not get it work. I just want to make sure a user to answer questions by checking radio buttons and leave no question unanswered. Here is the codes:

Html
….
Gender:
<input type="radio" id="Male" name="Gender"> Male
<input type="radio" id="Female" name="Gender"> Female

Member:
<input type="radio" id="Mem" name="Member"> Yes
<input type="radio" id="NonMem" name="Member"> No

Vegetarian:
<input type="radio" id="Veg" name="Veget"> Yes
<input type="radio" id="NonVeg" name="Veget"> No
……

function validate()

if (!document.getElementByID("Male").checked && !document.getElementByID("Female").checked)
        {alert("Please specify gender");
        return;}

if (!document.getElementByID("Mem").checked && !document.getElementByID("NonMem").checked)
        {alert("Please specify member");
        return;}

if (!document.getElementByID("Veg").checked && !document.getElementByID("NonVeg").checked)
        {alert("Please specify vegetarian");
        return;}

Any answers/helps would be greatly appreciated.

What I found out was the codes does not work when I tested in Live View using Dreamweaver with my notebook. It keeps popping up the alert "Please specify gender" even though gender was selected. It works perfectly in my server as an html page. Thank you all for your answers. — dsanh
– dsanh, Commented Mar 12, 2015 at 7:30

saikiran.vsk · Accepted Answer · 2015-03-11 10:08:00Z

function validate()
{
if (!document.getElementById("Male").checked && !document.getElementById("Female").checked)
        {alert("Please specify gender");
        return;}

if (!document.getElementById("Mem").checked && !document.getElementById("NonMem").checked)
        {alert("Please specify member");
        return;}

if (!document.getElementById("Veg").checked && !document.getElementById("NonVeg").checked)
        {alert("Please specify vegetarian");
        return;}
  alert("successfully validated");
  }

Gender:
<input type="radio" id="Male" name="Gender"> Male
<input type="radio" id="Female" name="Gender"> Female
<br>
Member:
<input type="radio" id="Mem" name="Member"> Yes
<input type="radio" id="NonMem" name="Member"> No
<br>
Vegetarian:
<input type="radio" id="Veg" name="Veget"> Yes
<input type="radio" id="NonVeg" name="Veget"> No
<br>
<input type='button' value='Validate' onclick='validate()'>

document.getElementByID to document.getElementById

Kishan · Accepted Answer · 2015-03-11 10:23:27Z

try this

<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
 Gender:
    <input type="radio" id="Male" name="Gender"> Male
    <input type="radio" id="Female" name="Gender"> Female
    <br>
    Member:
    <input type="radio" id="Mem" name="Member"> Yes
    <input type="radio" id="NonMem" name="Member"> No
    <br>
    Vegetarian:
    <input type="radio" id="Veg" name="Veget"> Yes
    <input type="radio" id="NonVeg" name="Veget"> No
    <br>
    <input type='button' value='Validate' onclick='validate();'>
    <script>
     function validate()
    {
    if (!document.getElementById("Male").checked && !document.getElementById("Female").checked)
            {alert("Please specify gender");
            return;}

    if (!document.getElementById("Mem").checked && !document.getElementById("NonMem").checked)
            {alert("Please specify member");
            return;}

    if (!document.getElementById("Veg").checked && !document.getElementById("NonVeg").checked)
            {alert("Please specify vegetarian");
            return;}
      alert("successfully validated");
      }
    </script>
</body>
</html>

Gunjan Patel · Accepted Answer · 2015-03-11 10:30:19Z

0

You mess up small code error BUT your logic is totally right...Just take a look at your code

you used document.getElementByID it may be document.getElementById ...did you get that ?

Not ID. it's Id.

answered Mar 11, 2015 at 10:30

Gunjan Patel

2,3624 gold badges27 silver badges52 bronze badges

Comments

joan16v · Accepted Answer · 2015-10-29 08:22:50Z

0

Simple, just correct the "TypeError" in your Javascript code:

Replace:

document.getElementByID

With:

document.getElementById

edited Oct 29, 2015 at 8:22

joan16v

5,1374 gold badges51 silver badges50 bronze badges

answered Oct 29, 2015 at 8:07

SSS

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