1// jQuery version 1.6 or above use:
2$("#myRadioID").prop("checked", true);
3
4//jQuery versions below 1.6 use:
5$("#myRadioID").attr('checked', 'checked');
1$('#element').click(function() {
2 if($('#radio_button').is(':checked')) { alert("it's checked"); }
3});
4
1$("input:radio[name='thename']").each(function(i) {
2 this.checked = false;
3});