关于 radio的问题

Question

<input type="radio" name="A1" value="测试0">测试0

Answer 1

<input type="radio" name="A1" value="0"><span>测试0</span>
<input type="radio" name="A1" value="1"><span>测试1</span>
<input type="radio" name="A1" value="2"><span>测试2</span>
<input type=button onClick="test()"><script language=javascript>
function test()
{
    var m = document.all.A1.length;
    var chkValue;
    for (var i = 0; i < m; i++ )
    {
if (document.all.A1[i].checked)
{
      alert(document.all.A1[i].nextSibling.innerHTML)
          }
    }
}
</script>

Answer 2

<input type="radio" name="A1" value="0"><span>测试0</span>
<input type="radio" name="A1" value="1"><span>测试1</span>
<input type="radio" name="A1" value="2"><span>测试2</span>
<input type=button onClick="test()"><script language=javascript>
function test()
{
    var m = document.all.A1.length;
    var chkValue;
    for (var i = 0; i < m; i++ )
    {
if (document.all.A1[i].checked)
{
      alert(document.all.A1[i].nextSibling.innerHTML)
          }
    }
}
</script>
后缀要带清楚啊