.modal-header
  button.close data-dismiss="modal" type="button"
    span aria-hidden="true"  ×
    span.sr-only Close
  h3.modal-title Import Skills
.modal-body
  .row
    .col-sm-12.text-center.pt20
      = form_tag import_csv_admin_skills_path, multipart: true do
        = file_field_tag :file
        = submit_tag "Import", class: 'btn btn-default mt20', :onclick =>"submitbtn()"


javascript:
  function submitbtn(){
    if($("#file").val()=="")
    {
      alert('Please Upload File.');
      return false
    }
  }