JAVASCRIPT

jquery select radio by name

$("input[type='radio'][name='theme']").click(function() {
    var value = $(this).val();
});

jquery select radio

$(function() {
    var $radios = $('input:radio[name=gender]');
    if($radios.is(':checked') === false) {
        $radios.filter('[value=Male]').prop('checked', true);
    }
});

input radio checked jquery

!$("input:radio[value='7'][name='employee-type']").prop('checked')

Select radio button through JQuery

$("#radio_1").prop("checked", true);