old_contents: var MusicModel = Backbone.Model.extend({});
  var MusicList = Backbone.Collection.extend({ model: MusicModel });
  
  musicList = new MusicList({});
  musicList.reset([
      {
  	num: 1,
  	title: 'Setting Forth',
  	album: 'Into the Wild',
  	artist: 'Eddie Vedder'
      },
      {
  	num: 2,
  	title: 'No Ceiling',
  	album: 'Into the Wild',
  	artist: 'Eddie Vedder'
      }
  ]);
  
  var MusicView = Backbone.View.extend({
      tagName: 'div',
      className: 'music entry',
      initialize: function(){
  	this.template = _.template('<%= num %> | <%= title %> | <%= album %> | <%= artist %>');
      },
      render: function(){
  	this.$el.html(this.template(this.model.toJSON()));
  	return this;
      }
  });
  
  var MusicFormView = Backbone.View.extend({
      el: 'div.wrapper',
      events: {
  	'submit #musicform': 'submit'
      },
      submit: function(event){
  	event.preventDefault();
  	$.post(this.$el.attr('action'),
  	       this.$el.serialize())
  	    .done(function(data){
  		console.log(data);
  	    });
  	return false;
      }
  });
  
  var MusicListView = Backbone.View.extend({
      el: '#toEdit',
      collection: musicList,
      addOne: function(thisModel) {
  	var musicView = new MusicView({ model: thisModel });
  	this.$el.append(musicView.render().el);
      },
      addAll: function() {
  	this.collection.forEach(this.addOne, this);
      },
      render: function() {
  	this.addAll();
      }
  });
  
  var musicApp = new (Backbone.Router.extend({
      routes: { '': 'index' },
      initialize: function(){
  	this.musicListView = new MusicListView({});
  	this.musicFormView = new MusicFormView({});
      },
      start: function(){
  	Backbone.history.start({ pushState: true });
      },
      index: function(){
  	this.musicListView.render();
      }
  }));
  
  $(function(){
      musicApp.initialize();
      musicApp.start();
  });
  
new_contents: var MusicModel = Backbone.Model.extend({});
  var MusicList = Backbone.Collection.extend({ model: MusicModel });
  
  musicList = new MusicList({});
  musicList.reset([
      {
  	num: 1,
  	title: 'Setting Forth',
  	album: 'Into the Wild',
  	artist: 'Eddie Vedder'
      },
      {
  	num: 2,
  	title: 'No Ceiling',
  	album: 'Into the Wild',
  	artist: 'Eddie Vedder'
      }
  ]);
  
  var MusicView = Backbone.View.extend({
      tagName: 'div',
      className: 'music entry',
      initialize: function(){
  	this.template = _.template('<%= num %> | <%= title %> | <%= album %> | <%= artist %>');
      },
      render: function(){
  	this.$el.html(this.template(this.model.toJSON()));
  	return this;
      }
  });
  
  var MusicFormView = Backbone.View.extend({
      el: 'div.wrapper',
      events: {
  	'submit #musicform': 'submit'
      },
      submit: function(event){
  	$.post(this.$el.attr('action'),
  	       this.$el.serialize())
  	    .done(function(data){
  		console.log(data);
  	    });
  	return false;
      }
  });
  
  var MusicListView = Backbone.View.extend({
      el: '#toEdit',
      collection: musicList,
      addOne: function(thisModel) {
  	var musicView = new MusicView({ model: thisModel });
  	this.$el.append(musicView.render().el);
      },
      addAll: function() {
  	this.collection.forEach(this.addOne, this);
      },
      render: function() {
  	this.addAll();
      }
  });
  
  var musicApp = new (Backbone.Router.extend({
      routes: { '': 'index' },
      initialize: function(){
  	this.musicListView = new MusicListView({});
  	this.musicFormView = new MusicFormView({});
      },
      start: function(){
  	Backbone.history.start({ pushState: true });
      },
      index: function(){
  	this.musicListView.render();
      }
  }));
  
  $(function(){
      musicApp.initialize();
      musicApp.start();
  });
  
subject: remove redundant preventDefault() call