<div id="inserting">
     <button id="inserting_btn">Upload</button>
     <input type="file" id="inserting_file"/>
   </div>

$('#inserting_btn').click(function(){
        var file = $('#inserting_file').val();
        $.ajax({
            method: 'POST',
            url: 'input_text/import.php',
            data: 'file='+file,
            success: function(data){
                alert(data);
            }
        });
    });

if ($_FILES['file']['tmp_name'] ){
       echo 'yes';
    }
    else {
        echo 'no';
    }