<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>Login.html</title>

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">

    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
    <script type="text/javascript">
      function checkuser() {
         if($('uname' == "lala") && $('pwd') == "123") {
           return true;
         }else {
            return false;
         }
      }

      function $(id) {
        return document.getElementById(id).value;
      }
     </script>
  </head>

  <body>
    <form action="ok.html">
      u:<input type="text" id="uname"/><br>
      p:<input type="password" id="pwd"/><br>
      <input type="submit" value="登錄" onclick="return checkuser()"/>
    </form>
  </body>
</html>

這是登錄頁面，只有當(dāng)用戶名為lala，密碼為123時(shí)登錄成功。在onclick事件處使用return,是在用戶名和密碼輸入不符時(shí)，阻止頁面跳轉(zhuǎn)。登錄成功頁面中，含有等待秒數(shù)，代碼為:

復(fù)制代碼代碼如下:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>ok.html</title>

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="this is my page">
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">

    <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
    <script type="text/javascript">
        function tiao() {
          clearInterval(mytime);
          window.open("manage.html","_self");
        }

        setTimeout("tiao()",5000);

        function changeSec() {
           //得到myspan值
           $('myspan').innerText=$('myspan').innerText-1;
        }

         function $(id) {
        return document.getElementById(id);
      }
        var mytime = setInterval("changeSec()",1000);
    </script>
  </head>

  <body>
    登錄成功，<span id="myspan">5</span>秒后自動(dòng)跳轉(zhuǎn)到管理頁面
  </body>
</html>

關(guān)鍵在幾個(gè)函數(shù)的使用，setTimeout("tiao()",5000);函數(shù)是打開頁面，等待5秒，調(diào)用tiao()函數(shù)。setInterval("changeSec()",1000);函數(shù)是每隔1秒調(diào)用一次changeSec()函數(shù)。這樣就完成了簡(jiǎn)單的登錄功能。

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