<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title> new document </title>
  <meta http-equiv = "content-type" content ="text/html;charset=utf-8" /> 
  <meta name="keywords" content="">
  <meta name="description" content="">  
 </head>  
 <body onload = "dosomething()">
  <form onsubmit = "return oncheck();">
    <p><label for="username">用户名：</label><input type="text"  name="username" id="username" onfocus = "this.value = '';"  onblur="if(this.value == '')alert('用户名不能为空');"  value="请输入你的用户名" /></p>
    <p><label for="pwd">密码：</label><input type="password" name="pwd" id="pwd"   ></p>
    <p><input type="checkbox" id="re" name="re" onclick = "alert('你选择了记住密码')" ><label for="re">记住密码</label></p>
    <p>  
        <input type="submit" name="" value="登录" /> 
        <input type="reset" name="pwd" value="取消"> 
    </p>
    
  </form>
  <script type="text/javascript">
    function dosomething(){
        alert("页面加载完成，欢迎来到登录页面");     
    }
    function oncheck(){
        if( confirm("确定提交登录吗？") ){
            return true;
        }else{
            return false;
        }
    }
  </script>
 </body>
</html>