获取单选按钮的值并传值

<formmethod ="post"name="form">
<label><inputtype ="radio"name="radio"value="A">A</inputtype></label>
<label><inputtype ="radio"name="radio"value="B">B</inputtype></label>
<label><inputtype ="radio"name="radio"value="C">C</inputtype></label>
<inputtype ="button"onclick="ok()"value="测试选择值">
 
</inputtype></formmethod>

<script language="javascript" type="text/javascript">  
<!--  
function ok() 
{  
var temp=document.getElementsByName("radio");  
for (i=0;i<temp.length;i++){  
//遍历Radio 
if(temp[i].checked)  
{alert("你选择了"+temp[i].value);  
//获取Radio的值 
document.form2.textfield.value="你选择了"+temp[i].value;  
//传递给另外一个表单 
}  
}  
}  
-->  
</script>