php记住登陆状态如何完成

<script type="text/javascript">  var cookie_key = "micro_login_mind_acc";  function submitform() {    if ($("#login_form .circle").length > 0) {      var fm = $("#login_form")[0], exdate = new Date();      exdate.setDate(exdate.getDate() + 30);      if($("#mind_me_a.selected").size() > 0 && fm.account.value){        document.cookie = cookie_key + "=" + escape(fm.account.value) + ";expires=" + exdate.toGMTString();      }else{        document.cookie = cookie_key + "=" + escape(fm.account.value) + ";expires=Sun, 28 Sep 2000 00:00:00 GMT";      }      if (!fm.account.value) {        alert("帐号不为空！");        return;      }      if (!fm.password.value) {        alert("密码不为空！");        return;      }      $("#login_form").submit();    } else {      alert("您好，暂未开放");    }    return false;  }  $(function() {    document.onkeydown = function(e){    var ev = document.all ? window.event : e;    if(ev.keyCode==13) {           //submitform();          // $("#login_form").submit();     }}     $("#login_form").submit(function() {      $.post(this.action, $(this).serialize(), function(data) {        if (data.success) {          location.href = "/server.php";        } else {          alert(data.errors.join(","));        }      }, "json");      return false;    });    //记住我    var coks = document.cookie;    if(coks){      var ckar = coks.split(";");      for(var i in ckar){         var kv = ckar[i].split("=");         if($.trim(kv[0]) === cookie_key) {           $("#login_form")[0].account.value = unescape(kv[1]); } }    }    $("#mind_me_a").click(function(){ $(this).toggleClass("selected"); return false; });  });</script>

<form method="post" id="login_form" action="login.php" onSubmit="return false;">    <p style=" margin-bottom:20px"><label>账号</label><input type="text" name="account" class="gLInp" value="" /></p>    <p><label>密码</label><input type="password" name="password" class="gLInp" /></p>    <div class="gRem"><a id="mind_me_a" href="" target="_blank" class="selected">记住我</a>记住登录状态</div>        <div class="gFgt">       <a href="http://www.test.com/forgectps.php" target="_blank" >忘记密码</a>       <a href="http://www.test.com/forgectps.php" target="_blank">修改密码</a>    </div>    <p class="gAcc submit circle"><a href="#" onclick="submitform();" target="_self">账号登录</a> </p>    <p class="regis">       <a href="http://www.test.com/" target="_blank">         <img  src="/image/Zhuce_1.png"    style="max-width:90%"  style="max-width:90%" / alt="php记住登陆状态如何完成" >       </a>    </p></form>