Jquery 获得单选按钮组中选中的值

1 <label><input type="radio" name="RadioGroup1" class="RadioGroup1" value="male" />男</label>
2 &nbsp; 
3 <label><input type="radio" name="RadioGroup1" class="RadioGroup1" value="female" />女</label>

1 <script type="text/javascript">
2 $(document).ready(function(){
3     $(".RadioGroup1").change(function(){                    
4         alert($(".RadioGroup1:checked").val());
5     });
6 });
7 </script>