Select elements inside of a form

Select elements inside of a form

I'm trying to select a div inside of a form.  Quickly I can select the form using this first console line, left out wrapping elements for simplicity:
  1.  console.log($(mythis).find('input.img1').next('form'));
  1. <input class="img1">
  2. <form method="POST"  id="custom_12_img1">
  3.   <div class="drop-field">
  4.     <img class="preview" src="#" alt="Preview Image">
  5.   </div>
  6. </form>
  7. ... other forms

And when I try to select inside of the form, it says 0:  $(mythis).find('.ffproedit').find('input.img1').next('form').find('drop-field'));

Is there something special you have to do, to select elements inside a form?