// jQuery version 1.6 or above use: $("#myRadioID").prop("checked", true); //jQuery versions below 1.6 use: $("#myRadioID").attr('checked', 'checked');
$(document).ready(function(){ $('#submit_button').click(function() { if (!$("input[name='name']:checked").val()) { alert('Nothing is checked!'); return false; } else { alert('One of the radio buttons is checked!'); } }); });
//<input type="radio" name="book_condition" value="3" > $("input:radio[value='3'][name='book_condition']").prop('checked',true);