form login 1 plus js

<form id='login' class='block'>
        <h3>LOGIN</h3>
        <p class='text-warning info'>&nbsp;</p>

        <dl>
            <dt>Username</dt>
            <dd><input name='username' type=text placeholder='your username' value='' /></dd>
            <dt>Password</dt>
            <dd><input name='password' type='password' value='' /></dd>
            <dt>Type</dt>
            <dd><select name='type' class='selType' ><option value=0>Pilih Type
            </select></dd>
            <dd><input name='submit' class='btn' type='submit' value='Login'  onclick='checkLogin();return false;' /></dd>
        </dl>
        <address>Jl Pejaten Barat IV no 43 Jakarta 12510
        </address>
        </form>
<script>
function checkLogin()
{
    var selectorform="form#login";
    var datax = $(selectorform).serialize();
    console.log('check login');
    var request = $.ajax({
          url: "check.php",
          type: "POST",
          data: datax ,
          dataType: "json"
    });

    request.success(function(msg) {
       console.log('berhasil');
       if(msg.type)
       {
          $(".selType").empty();
          $(".selType").append(msg.type);

       }

       if(msg.alert)
       {

        $(".info").html(msg.alert);
        alert(msg.alert);
       }
       //kalau yang dikirim ada url berarti sudah OK dan siap masuk ke sistem
       if(msg.url)
       {
        window.location =msg.url;
       }

    });

    request.fail(function(jqXHR, textStatus) {
      alert( "Request failed: " + textStatus );
    });
    return false;
}
</script>
<script src="http://localhost/nasgor1/assets/js/jquery.min.js"></script>