Image Loading with Underscore

app.js

    initialize: function(){
      _.bindAll(this, 'render', 'onImgLoad');

      this.mainImg = new Image();
      this.mainImg.src = this.model.get('img');

      this.userImg = new Image();
      this.userImg.src = this.model.get('admin').img;

      this.mainImg.onload = this.onImgLoad;
      this.userImg.onload = this.onImgLoad;
    },

    onImgLoad: _.after(2, function(){
      this.render();
    }),