jQuery Получите значение value radio по имени
var value = $('input[name="name_of_your_radiobutton"]:checked').val();
Ivan The Terrible
var value = $('input[name="name_of_your_radiobutton"]:checked').val();
$("input[type='radio'][name='theme']").click(function() {
var value = $(this).val();
});
$(function() {
var $radios = $('input:radio[name=gender]');
if($radios.is(':checked') === false) {
$radios.filter('[value=Male]').prop('checked', true);
}
});