// jQuery version 1.6 or above use: $("#myRadioID").prop("checked", true); //jQuery versions below 1.6 use: $("#myRadioID").attr('checked', 'checked');
$("checkbox").is(":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:radio[name='thename']").each(function(i) { this.checked = false; });