application.js

  $("*[contenteditable]").live({
    blur: function(){
      var model     = $(this).attr("data-model"),
          attribute = $(this).attr("data-attribute") || $(this).attr("class"),
          value     = $(this).text(),
          path      = $(this).attr("data-path"),
          updateData = {};
      updateData[model] = {};
      updateData[model][attribute] = value;
      $.ajax({
        type: 'PUT',
        dataType: 'script',
        url:  path,
        data: updateData
      });
    },
    keypress: function(e){
      if (e.keyCode == 13)
        $(this).blur();
    }
  });