javascript讀寫cookie的一個小demo

來源:互聯網
上載者:User
<!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>test Cookie</title>
    <link rel="Stylesheet" type="text/css" href="../css/mainStyleSheet.css" />
</head>
<body>
  <h1 align="center">Cookie讀寫測試</h1>
  <hr />
  <h2>write cookie:</h2>
  <form id="login" name="login">
    <table width="100%">
        <tr>
        <td align="right">User name:</td>
        <td><input type="text" id="username" /></td>
        </tr>
        <tr>
        <td align="right">Password:</td>
        <td><input type="password" id="password" /></td>
        </tr>
        <tr><td colspan="2" align="center">
        <input type="submit" id="ok" value="writer" onclick="javascript:writecookie(login)" />
        </td></tr>
     </table>
  </form>
  <script language="javascript" type="text/javascript">
  <!--
    function writecookie(fm)
    {
         var cookiename = fm.username.value;
         var cookievalue = fm.password.value;
         var codecookievalue = "";
         for(var i = 0;i < cookievalue.length; ++i)
         {
            codecookievalue += cookievalue.charCodeAt(i);
            if(i < cookievalue.length-1)
                codecookievalue += "+";
         }      
         var cookie = cookiename + "=" + codecookievalue;
         var date = new Date();
         date.setTime(date.getTime() + 100000);
         var expirestr = date.toGMTString();
         cookie += "; expires=" + expirestr;
         document.cookie = cookie;
    } 
  -->
  </script>
  <hr />
  <h2>read cookie:</h2>
  <input id="read" type="button" value="Read Cookie" onclick="javascipt:readcookie()" />
  <script language="javascript" type="text/javascript">
  <!--
    function readcookie()
    {
        var cookiepair = document.cookie.split("=");
        if(cookiepair[0] != null
           && cookiepair[1] != null)
        {
            var truevalue = "";
            var arraycode = cookiepair[1].split("+");
            for(var i = 0; i < arraycode.length; ++i)
                truevalue += String.fromCharCode(arraycode[i]);
            if(cookiepair != null)
            {       
                document.writeln("<table width=/"100%/">");
                document.writeln("<tr>");
                document.writeln("<td>");
                document.writeln("user name:");
                document.writeln("<//td>");
                document.writeln("<td>");
                document.writeln(cookiepair[0]);
                document.writeln("<//td>");           
                document.writeln("<//tr>");
                document.writeln("<tr>");
                document.writeln("<td>");
                document.writeln("password:");
                document.writeln("<//td>");
                document.writeln("<td>");
                document.writeln(truevalue);
                document.writeln("<//td>");          
                document.writeln("<//tr>");
                document.writeln("<//table>");
            }
        }
        else
            document.writeln("no cookie!");
    }
  -->
  </script> 
</body>
</html>
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