区分第一个和其它，怎么实现？

类似代码：
<form  name=mxh3>
<div id=mxh1 style="position:absolute;visibility: hidden"><input value="dtest" type="text"></div>
<div id=mxh2 style="position:absolute;visibility: hidden"><input value="d" type="text"></div>
<br><br>
<input  name=aa  type=radio  onclick="change()">显示
<input  name=aa  type=radio  onclick="change1()">隐藏

</form>
<script>
function change(){
  document.all.mxh2.style.visibility='visible';
  document.all.mxh1.style.visibility='hidden';
}
function change1(){
  document.all.mxh2.style.visibility='hidden';
  document.all.mxh1.style.visibility='visible';
}
</script>

解决方案 »

免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货

<html>
<body>
<select id=s1 name="address" onchange="aa()">
   <option selected>1</option>
   <option>2</option>
                    <option>3</option>
                    <option>4</option>

                    </select>
                    <script>
                    function aa()
                    {

                        if(s1.options[s1.selectedIndex].text =='1')
                         {
                         ok1.style.display='none';
                         ok2.style.display='';
                         }
                        else
                         {
                         ok1.style.display='';
                         ok2.style.display='none';
                         }
                    }
                    </script>
                    <input name=ok1 type=radio>
                    <input name=ok2 type=radio>
                     </body>
                    </html>
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">
<TITLE></TITLE>
</HEAD>
<BODY>
<form name=frm1>
<select name="address" onchange=a()>
<option selected value=1>1</option>
<option value=2>2</option>
    <option value=3>3</option>
    <option value=4>4</option>
</select>
<div id=apple></div>
</form>
</BODY>
</HTML>
<script language=javascript>
function a()
{
if (document.frm1.address.value=="1")
{
apple.innerHTML="<input type='radio' name='ok1'>12121";
}
else
{
apple.innerHTML="<input type='radio' name='ok2'>222222";
}
}
</script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<select name="address" onchange="fn()">
   <option selected>1</option>
   <option>2</option>
   <option>3</option>
   <option>4</option>
</select>
<input type="radio" name="ok1">
<input type="radio" name="ok2"><script>
function fn()
{
  var sel = document.all("address");
  var s = sel.options[sel.selectedIndex].text;  if (s == 1)
  {
    document.all("ok1").style.visibility = "hidden";
    document.all("ok2").style.visibility = "visible";
  }
  else
  {
    document.all("ok1").style.visibility = "visible";
    document.all("ok2").style.visibility = "hidden";
  }
}</script></BODY>
</HTML>
<select name="address" id="address" onChange="change();">
   <option selected>1</option>
   <option>2</option>
                    <option>3</option>
                    <option>4</option><input type="radio" name="ok1" id="ok1">
<input type="radio" name="ok2" id="ok2">
<script language="JavaScript">
function change()
{
if(address.options[address.selectedIndex].text=='1')
{
ok1.style.display="none";
ok2.style.display="";
}
else
{
ok1.style.display="";
ok2.style.display="none";
}
}
change();
</script>
<html><head><title>New Page 1</title>
<script>
function check()
{
   if(f1.a1[1].selected)
   {
     if(f1.ok2.style.visibility="hidden"){
       f1.ok1.style.visibility="hidden"
       f1.ok2.style.visibility="visible"
     }
   }
   else
   {
    if( f1.ok1.style.visibility="hidden")
    f1.ok2.style.visibility="hidden"
    f1.ok1.style.visibility="visible"
   }
}
</script>
</head><body>
<form name="f1">
<select name="a1" onchange="check()">
   <option>please select</option checked>
   <option>1</option>
   <option>2</option>
   <option>3</option>
   <option>4</option>
<input type="radio" name="ok1" >
<input type="radio" name="ok2"></form>
</body></html>
不行："ok1未定义。。"可我有呀。。<input type="radio" name="ok1"　value=1>
         <input type="radio" name="ok1"　value=2>
<input type="radio" name="ok1"　value=3>
TO： sportdog(再和我谈编程我就咬你）。。
<input type="radio" name="ok1"　value=1>
<input type="radio" name="ok1"　value=2>
<input type="radio" name="ok1"　value=3>
这样有多个呀？
有多个你就写多个嘛！
apple.innerHTML="<input type='radio' name='ok1'><input type='radio' name='ok1'>....";
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">
<TITLE></TITLE>
</HEAD>
<BODY>
<form name=frm1>
<select name="address" onchange=a()>
<option selected value=1>1</option>
<option value=2>2</option>
    <option value=3>3</option>
    <option value=4>4</option>
</select>
<div id=apple></div>
</form>
</BODY>
</HTML>
<script language=javascript>
function a()
{
if (document.frm1.address.value=="1")
{
apple.innerHTML="<input type='radio' name='ok1' value='1'><input type='radio' name='ok1' value='2'><input type='radio' name='ok1' value='3'>";
}
else
{
apple.innerHTML="<input type='radio' name='ok2'>222222";
}
}
</script>