show.html.erb

<div class="box">
  <h3><%=h @word.name %></h3>
  <pre><%=h @word.description %></pre>
  <a href="#" id="asdf">(削除)</a>
</div>

<%= a("一覧に戻る", :index) %>

<script type="text/javascript">
$(document).ready(function(){
  $("#asdf").click(function(){
    if(confirm('本当に?')){
      $.post("<%= r(:delete, @word.id) %>", function(){
        location.href = "<%= r(:index) %>";
      });
    }
  });
});
</script>