Ruby on Rails: Submit a form as a JS based on a change in select box

Question

I have the following HTML generated by form_tag and select_tag in Rails:

Answer 1

I solved the problem doing it the following way:

<%= f.select :foldernames, options_for_select(@folders, @folders.first), {}, {:onchange=>"myfunc()"}%>

and i added

and the form is being submitted as JS instead of HTML. It would be very helpful if someone can explain me why this is being submitted as JS instead of HTML The same code when i write :onchange=> this.form.submit, is being submitted as HTML