unobtrusive_put_post_links.js

// Examples:
// 
//   HTML:
//     <form action='messages/1/mark_unread'><input type='submit' class='button_to_link' value='Mark Unread'/></form>
//
//   Rails:
//     button_to "Mark as unread", mark_as_unread_message_path(message), :method => :put, :class => "button_to_link"
//
//   jQuery:
//     $(document).ready(function() {
//       $('.button_to_link').button_to_link()
//     });
//
jQuery.fn.button_to_link = function() {
  // return the jQuery object for chaining
  return this.each(function(button){
    var form = button.parents('form');
    form.after('<a href="' + form.attr('action') + '" class="button_link_to">' + button.attr('value') + '</a>');
    form.hide();
    
    form.next('a.button_link_to').click(function(){
      form.submit();
      return false;
    });
  })
});

// Or you could just use a button and style it.