跨域自动登录

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
    </script>
</head>
<body>
<a href="#" onclick="goto()">点击跳转</a>

<script type="application/javascript">
    function goto() {
        var url = "http://www.bidchance.com/logon.do";
        var userid = "xxxxx";
        var pwd = "yyyyy";

        var url_to = "http://www.bidchance.com/info-gonggao-30138261.html";

        $.ajax({
            url: url,
            type: "post",
            data: {
                userid: userid,
                pwd: pwd
            },
            dataType: 'jsonp', // 跨域访问
            crossDomain: true,
            success: function (msg) {
                console.log(msg);
            },
            error: function (XMLHttpRequest, textStatus, errorThrown) {
                console.log(XMLHttpRequest.status);
                console.log(XMLHttpRequest.readyState);
                console.log(textStatus);

                if (XMLHttpRequest.readyState == 4) { // 响应完成
                    window.open(url_to);
                }
            }
        });
    }
</script>

</body>
</html>
不积跬步，无以至千里；不积小流，无以成江海。