设置会话Ajax发布[关闭]

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            <div class="grid--cell mb0 mt8">Closed <span title="2013-05-16 00:04:26Z" class="relativetime">6 years ago</span>.</div>
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anyway for set session when remote login with ajax .

this is my code

var result = null;
var scriptUrl = "http://www.site.com/login.bs";

   $.ajax({ 
     url: scriptUrl,
     type: 'post',
     data: ({txtTitle : 'tt1', txtText : 'tt2'}),
     dataType: 'json',
    async: false,
    success: function(data) {
            alert("success");
        },
        error: function (err) {
            alert("error"); 
        } 
     });

in target page when login session[user] set . but when i refresh page alert error .

target code

if($_POST[txtTitle]=='tt1' && $_POST[txtText]=='tt2') 
{
     $_SESSION[user]='ok';
}

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