JavaScript loginPage with val

Hey guys i have a website to develop for and just got it working (it's just testing not full functional code) the login. But it is quite ugly and i hope you guys can help me find out a way to make it more beautiful.

function loginButton(){
if($("#email_feld").val()!=""&&$("#passwort_feld").val()!=""){
    var form = new FormData();
    form.append("username", $("#email_feld").val());
    form.append("password", $("#passwort_feld").val());
    var settings = {
        "url": "http://ift.tt/2lfqX4y",
        "method": "PUT",
        "processData": false,
        "contentType": false,
        "mimeType": "multipart/form-data",
        "data": form
    }
    $.ajax(settings).done(function (response) {
        window.document.location.href = "main.html";
        localStorage.setItem('token', response);
    })
    .fail(function(){
       $('#fehlermeldung_platzReservierung').load('ChangeBody.html #error1',function(){
            $('#textFieldError').html("Benutzername oder Passwort falsch!");
       });
    });
}
else{
    $('#fehlermeldung_platzReservierung').load('ChangeBody.html #error1',function(){
        $('#textFieldError').html("Geben Sie Benutzername und Passwort ein!");
    });
 }

}