JS,JQuery,获得选中的Radio值

1 <input type="radio" name="gender" id="a1" value="1"  checked="checked" /><label for="a1">男</label>
2 &nbsp;&nbsp;
3 <input type="radio" name="gender" id="a2" value="2" />
4 <label for="a2">女</label>

1 function test()
2 {
3   var temp = document.getElementsByName("gender");
4   for(var i=1;i<temp.length;i++)
5   {
6      if(temp[i].checked)
7            var gender= temp[i].value;
8   }
9 }

1   var gender= $("input[name=‘gender‘]:checked").val();