asp 表单交付验证js不起作用，望各位指点！

asp 表单提交验证js不起作用，望各位指点！！！
asp 有一个表单提交页面，但js不起作用，空信息也能提交成功，不知是何原因，现在我把代码贴出来，望指教……
 <form action="baoxian-book.asp" method=post name=editform onSubmit="return checkinput(editform)">
…………………………
…………………………………………
</form>

js
<script language="Javascript">

  function checkinput(form)
{
var flag=true;
if (form("name").value == "") 
  {
alert("申请人姓名不能为空!"); form("name").focus(); flag = false; return flag
}
  else 
  {
  flag=true
  }
  if (form("enname").value == "") 
  {
  alert("参团人英文名字不能为空!"); form("enname").focus(); flag = false; return flag
  }
  else 
  {
  flag=true
  }
  if (form("passport").value == "") 
  {
  alert("护照号码不能为空!"); form("passport").focus(); flag = false; return flag
  }
  else 
  {
  flag=true
  }
  if (form("email").value == "")
  {
  alert("email不能为空!"); form("email").focus(); flag = false; return flag
  }
  else 
  {
  flag=true
  }
  if (form("company").value == "") 
  {
  alert("发票名字不能为空!"); form("company").focus(); flag = false; return flag
  }
  else 
  {
  flag=true
  }

  if (form("destination").value == "") 
  {
  alert("出访国家不能为空!"); form("destination").focus(); flag = false; return flag
  }
  else 
  {
  flag=true
  }
  if (form("phone").value == "") 
  {
  alert("电话不能为空!"); form("phone").focus(); flag = false; return flag
  }
  else 
  {
  flag=true
  }
  if (form("address").value == "") 
  {
  alert("通讯地址不能为空!"); form("address").focus(); flag = false; return flag
  }
   
return flag;
}


</script>


------解决方案--------------------
form.name
这样写法也不多。name是保留字。
------解决方案--------------------

HTML code

<form action="baoxian-book.asp" method="post" name="editform" onsubmit="return checkinput(this.form)">

------解决方案--------------------
HTML code
<form action="baoxian-book.asp" method=post name=editform onSubmit="return checkinput()">
    姓名:<input type="test" name="name" />
    参团人英文名:<input type="test" name="enname" />
    护照号码:<input type="test" name="passport" />
    email:<input type="test" name="email" />
    发票名字:<input type="test" name="company" />
    出访国家:<input type="test" name="destination" />
    电话:<input type="test" name="phone" />
    通讯地址:<input type="test" name="address" />
    <input type="submit" value="提交" name="submit" />
</form>
<script type="text/javascript">
    function checkinput(){
        var n=["name","enname","passport","email","company","destination","phone","address"];
        var t=["姓名","参团人英文名","护照号码","email","发票名字","出访国家","电话","通讯地址"];
        var obj;
        for(var i=0;i< n.length;i++){
            obj=document.getElementsByName(n[i])[0];
            if(obj.value==""){
                alert(t[i]+"不能为空!");
                obj.focus();
                return false;
            }
        }
    }
</script>