jquery heck for radio selected code example

Example 1: check radio button is checked jquery

$(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!');
    }
  });
});

Example 2: unset radio button jquery by name

$("input:radio[name='thename']").each(function(i) {
       this.checked = false;
});