Radio selector
The :radio selector selects radio buttons. See the radio tag. The equivalent of $(':radio') is $('[type=radio]'). Since :radio is not part of the CSS specification, for better performance in modern browsers it is better to use [type='radio'] instead.
Syntax
This is how we select radio buttons:
$(':radio');
As with other pseudo-class selectors (those starting with ':'), it is better to precede ':' with the name of the tag or another selector, otherwise the '*' selector will be applied, i.e. $(':radio') will be treated as $('*:radio'), so it is better to use $('input:radio') instead. To select related radio buttons, you can use $('input[name=gender]:radio').
Example
Let's select the radio buttons, wrap them in a span. Then give the spans a green background and a red border using the css method:
<form>
<input type="button" value="button">
<input type="file">
<button>button</button>
<input type="reset">
<input type="radio" name="test">
<input type="radio" name="test">
<input type="text">
</form>
<+javascript+>
$('form input:radio')
.wrap('')
.parent()
.css({background: 'green', border: '2px red solid'});
$('form').submit(function(event) {
event.preventDefault(); // prevents form submission
});
<-javascript->
