刷新网页 表单好像把空数据提交了怎么修改，谢谢

Question

各位大神帮忙看看，我刷新页面是要原来都是空的页面，不需要为空的判断
<form action="${pageContext.request.contextPath}/RegisterServlet" method="post">
     <h3 align="center">注册</h3>
     <table width=40% border="1" align="center"> 
         <tr>
             <td width="20%">用户名 </td>
             <td>
             <input type="text" name="username" value="${formbean.username}" style="width: 30%">${formbean.errors.username}
             </td>
             </tr>
         <tr>
             <td width="20%">密码</td>
             <td>
             <input type="password" name="password" value="${formbean.password}" style="width: 30%">${formbean.errors.password}
             </td>
         </tr>
-------------------------------------------------------------------------
if(this.username == null || this.username.trim().equals("")) {
isOk = false;
errors.put("username","用户名不能为空");
}else {
if(!this.username.matches("[a-zA-Z]{3,8}")) {
isOk = false;
errors.put("username","用户名必须为3~8个字符");
}
}

Answer 1

在加载页面时把变量清空
$(function(){  
if(error != null || error != ''){
                     error.remove();
                }
  });