求助JSP 为什么不能验证呢！！

<html>
<head><title>信息表</title>
<link href="index.css" type="text/css" rel="stylesheet" >
<link rel="stylesheet" type="text/css" href="index.css">
<script language="javascript">
function check()
{
  var name=document.f1.name.value;
  var age=documeng.f1.age.value;
  if(name==""){
   alert("姓名不能为空");
   document.f1.name.focus();
   return false;
  }
  if(age==""){alert("年龄不能为空");document.f1.name.focus();return false;}
  var sex=new Array();
  sex =document.f1.sex;
  var sexsum=0;
  for(var i=0;i<sex.length;i++)
  {
   if(sex[i].checked){sexsum++;}
  }
  if(sexsum==0){alert("请选择性别");return false;}
  var interest=document.f1.interest;
  var interestsum=0;
  for(var i=0;i<interest.length;i++)
  {
   if(interest[i].checked){interestsum++;}
  }
   if(interestsum==0){alert("请选择爱好");return false;}
   var degree=document.f1.degree;
   var dg=true;
   for(var i=0;i<degree.length;i++)
   {
    if(degree.option[i].value!=""&&degree.option[i].selected)
{
dg=false;
}
   }
  if(dg){alert("请选学历");document.f1.degree.focus();return false;}
  if(document.f1.intro.value==""){alert("简介不能为空");return false;}
}
function selectAll()
{
  var o=document.forms(formName).item(cbName);
  if(o.length)
  {
   for(i=0;i<o.length;i++)
   {
    document.forms(formName).item(cbName)[i].checked=true;
   }
   else
   {
    o.checked=true;
   }
  }
}
function unselect()
{
  var o=document.forms(formName).item(cbName);
  if(o.length)
  {
   for(i=0;i<o.length;i++)
   {
    document.forms(formName).item(cbName)[i].checked=false;
   }
   else
   {
    o.checked=false;
   }
  }
}
</script>>
</head>
<body>
<from action="" name="f1" method="get"onSubmit= "return   check() ">
<table width="80%" class="default" align="center">
<tr class="title">
          <th colspan="2">信  息  统  计  表
</tr>
<tr>
<td align="right" valign="middle" class="item">姓名</td>
<td><input type="text" name="name" size="30"></td>
</tr>
<tr>
<td align="right" valign="middle" class="item">年龄</td>
<td><input type="text" name="age" size="30"></td>
</tr>
<tr>
<td align="right" valign="middle" class="item">性别</td>
<td><input type="radio" name="sex" value="1"checked>男
    <input type="radio" name="sex" value="0">女
</tr>
<tr>
<td align="right" valign="middle" class="item">爱好</td>
<td><input type="checkbox" name="interest" value="1">旅游<br>
    <input type="checkbox" name="interest" value="2">登山<br>
<input type="checkbox" name="interest" value="3">健身<br>
<input type="checkbox" name="interest" value="4">上网<br>
<input type="checkbox" name="interest" value="5">游泳<br>
</tr>
<tr>
<td align="right" valign="middle" class="item">学历</td>
<td>
<select name="degree">
<option value="">--请选择--</option>
<option value="1">高中</option>
<option value="2">专科</option>
<option value="3">本科</option>
<option value="4">硕士</option>
<option value="5">博士</option>
</select>
</td>
</tr>
<tr>
<td align="right" valign="middle" class="item">自我介绍:</td>
<td><textarea name="intro" rows="8" cols="30">自我介绍</textarea></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="sm" value="提交"><input type="reset" name="rs" value="重置"></td>
</tr>
</table>
</from>
</body>
</html>

解决方案 »

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
  <TITLE>demo</TITLE>
  <META http-equiv="content-type" content="text/html;charset=gbk"/>
  <META NAME="Generator" CONTENT="CSS">
  <META NAME="Author" CONTENT="zhangqian">
  <META NAME="Keywords" CONTENT="mydemo">
  <META NAME="Description" CONTENT="this is my demo">
  <link href="index.css" type="text/css" rel="stylesheet" >
  <link rel="stylesheet" type="text/css" href="index.css">
  <style type="text/css">
body
{

}
  </style>

   <script language="javascript">
function check()
{
  var name=document.f1.name.value;
  var age=document.f1.age.value;
  if(name==""){
  alert("姓名不能为空");
  document.f1.name.focus();
  return false;
  }
  if(age==""){alert("年龄不能为空");document.f1.age.focus();return false;}
  var sex=new Array();
  sex =document.f1.sex;
  var sexsum=0;
  for(var i=0;i<sex.length;i++)
  {
  if(sex[i].checked){sexsum++;}
  }
  if(sexsum==0){alert("请选择性别");return false;}
  var interest=document.f1.interest;
  var interestsum=0;
  for(var i=0;i<interest.length;i++)
  {
  if(interest[i].checked){interestsum++;}
  }
  if(interestsum==0){alert("请选择爱好");return false;}
  var degree=document.f1.degree;
  var dg=true;
  for(var i=0;i<degree.length;i++)
  {
  if(degree.options[i].value!=""&&degree.options[i].selected)
{
dg=false;
}
  }
  if(dg){alert("请选学历");document.f1.degree.focus();return false;}
  if(document.f1.intro.value==""){alert("简介不能为空");return false;}
}
function selectAll()
{
  var o=document.forms(formName).item(cbName);
  if(o.length)
  {
  for(i=0;i<o.length;i++)
  {
  document.forms(formName).item(cbName)[i].checked=true;
  }

  } else
  {
  o.checked=true;
  }
}

</script>  </HEAD>
  <BODY>

<form action="" name="f1" method="get"onSubmit= "return check() ">
<table width="80%" class="default" align="center">
<tr class="title">
  <th colspan="2">信  息  统  计  表
</tr>
<tr>
<td align="right" valign="middle" class="item">姓名</td>
<td><input type="text" name="name" size="30"></td>
</tr>
<tr>
<td align="right" valign="middle" class="item">年龄</td>
<td><input type="text" name="age" size="30"></td>
</tr>
<tr>
<td align="right" valign="middle" class="item">性别</td>
<td><input type="radio" name="sex" value="1"checked>男
<input type="radio" name="sex" value="0">女
</tr>
<tr>
<td align="right" valign="middle" class="item">爱好</td>
<td><input type="checkbox" name="interest" value="1">旅游<br>
<input type="checkbox" name="interest" value="2">登山<br>
<input type="checkbox" name="interest" value="3">健身<br>
<input type="checkbox" name="interest" value="4">上网<br>
<input type="checkbox" name="interest" value="5">游泳<br>
</tr>
<tr>
<td align="right" valign="middle" class="item">学历</td>
<td>
<select name="degree">
<option value="">--请选择--</option>
<option value="1">高中</option>
<option value="2">专科</option>
<option value="3">本科</option>
<option value="4">硕士</option>
<option value="5">博士</option>
</select>
</td>
</tr>
<tr>
<td align="right" valign="middle" class="item">自我介绍:</td>
<td><textarea name="intro" rows="8" cols="30">自我介绍</textarea></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="sm" value="提交"><input type="reset" name="rs" value="重置"></td>
</tr>
</table>
</form> </BODY>
</HTML>lz 太粗心了  form能写错..