// jQuery version 1.6 or above use:
$("#myRadioID").prop("checked", true);
//jQuery versions below 1.6 use:
$("#myRadioID").attr('checked', 'checked');$('#radio-button-id').click(function() {
if($('#radio-button-id').is(':checked'))
{
//input where you put a value
$('#program').val("radio-button-text");
}
});$("checkbox").is(":checked")$('#element').click(function() {
if($('#radio_button').is(':checked')) { alert("it's checked"); }
});
$('input:radio[name="postage"]').change(function(){
if ($(this).val() == 'Yes') {
//true
}
else {
//false
}
});$("#myRadioID").click();