disable submit button until file selected for upload

Question

I have a form for uploading images. I\'d like to disable the submit button, until user selects an image to upload. I\'d like to do it with jQuery. Currently I have a JavaScr

Answer 1

Try

   $('#my_uploader').change(function() {
      if($(this).val()) {
        $('#my_submit_button').attr('disabled', '');
      } else {
        $('#my_submit_button').attr('disabled', 'disabled');
      }
    });