<form method="POST" id="form" enctype="multipart/form-data">
        <label for="">Ad: </label>
        <input type="text" name="ad"><br>
        <label for="">Sekil</label>
        <input type="file" name="sekil"><br>
        <input type="submit" name="yolla">
     </form>
    
     <script src="http://code.jquery.com/jquery.min.js"></script>
     <script type="text/javascript">
        $(document).ready(function(){

            $('#form').submit(function(){

              $.ajax({
                method : 'POST',
                url : '?',
                data : new FormData($(this).serialize()),
              }).done(function(response){
                console.log(response);
              });

              return false;
            });

        });
     </script>