大家帮我看看我这个js表单验证怎么错了呢?点击没有反应,谢谢了
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
   <head>
     <base href="<%=basePath%>">      
     <title>My JSP 'register.jsp' starting page</title>      
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	<style type="text/css">
    body {background-color:#333333}
       table.one
          {
          table-layout: fixed;
		 background-color:#0033FF;
		border:none;
		border-style:none;						  				  
             }						
#yellow{
	color:#FFFF00
	}
#red{
	color:#FF0000
	}
#Layer1 {
	position:relative;
	width:700px;
	height:800px;
	z-index:1;
	left: 337px;
	top: 0px;
	background-image:url(02.jpg);	
}
     #Layer2 {
	position:relative;
	width:200px;
	height:115px;
	z-index:2;
	left: 181px;
	top: 66px;		
}    
     </style>
	<script language="javascript">
function yanzheng()
{   
    if (CheckName()&&CheckPwd()&&onlyid())
      {    
       return true;
      }
      return false;
}
function CheckName()
{
     var name=document.form1.username;
     if (name.value.length==0)
     {
        window.alert("用户名不能为空!");
        name.focus();
        return false;
     }
     if(!/^\w{3,8}$/.test(name.value))
	{
	window. alert("用户名必须为3到8位(数字字母下划线)");
	 name.select();
	 return false;
	}
     return true;
}
function CheckPwd()
{
     var pwd=document.form1.password;  
     if (pwd.value.length==0)
     {
        window.alert("密码不能为空!");
        pwd.focus();
        return false;
     }
     if (!/^\w{6,12}$/.test(pwd.value))
     {
        window.alert("密码长度在6到12位!");
        pwd.select();
        return false;
     }
     return true;
}
function onlyid()
{
var uid=document.form1.userid;    
  if (uid1.value.length==0)
     {
        window.alert("唯一标识不可为空!");
        uid1.focus();
        return false;
     }
return true;
}
</script>
   </head>        
    <body>
   <div id="Layer1">
	<div id="Layer2">
	<form action="denglu.action" method="