javascript中如何获得radio的值,见内(紧急!)

[woxin]

<script language=javascript>
function f()
{
var s = document.editRelateNewsForm.entitytype.value;
alert("entitytype is: "+s);
}
<script>

<form>
<tr><td align="center"><input type="radio" name="entitytype" value="0" checked>ID  <input type="radio" name="entitytype" value="1">标题</td></tr>
</form>
我想用户按了submit后,在javascript中获得类型为radio的entitytype的值,即"0"或"1",但现在却显示"entitytype is undified",怎么办,急

[zxhong]

document.formname.entitytype.value

[kickken]

如果网页中有同名的元素系统会自动建立以此元素名为数组名的数组
你可以用
var s = document.editRelateNewsForm.entitytype[0].value
访问第一个

[lbd8848]

document.all.entitytype.value;

[woxin]

在javascript中能判断出用户选择了哪个单选扭吗

[DragonFly-9]

获取radio第几个被选中：

var n=document.editRelateNewsForm.entitytype.length;

var selectindex=0;

for(var i=0;i<n;i++)
{
if(document.editRelateNewsForm.entitytype[i].checked==true)
selectindex = i;
break;
}

[江南昆虫]

<script language=javascript>
function f(){
var obj = document.editRelateNewsForm.entitytype;
for (i=0;i<obj.length;i++){
(obj[i].checked)?alert("entitytype is: "+obj[i].value):'';
}
}
</script>

<form method=post action="" name="editRelateNewsForm">
<input type="radio" name="entitytype" value="0" checked>ID
  <input type="radio" name="entitytype" value="1">标题
<button onClick="f()">检测</button>
</form>

[孟子E章]

<script language=javascript>
function f(){
var obj = document.getElementsByName("entitytype"); //不需要检测是否是集合了
for (i=0;i<obj.length;i++){
(obj[i].checked)?alert("entitytype is: "+obj[i].value):'';
}
}
</script>

<form method=post action="" name="editRelateNewsForm">
<input type="radio" name="entitytype" value="0" checked>ID
<input type="radio" name="entitytype" value="1">标题
<button onClick="f()">检测</button>
</form>