Edit in JSFiddle

var app = {
    
    log: jQuery('#log'),
    
    config: {  
        clickMessage: 'Hi! clicked!',
        mouseOverMessage: 'Mouseover!'
    },
    
    clickHandler: function() {
        this.log.html(this.config.clickMessage);
    },
    
    nested: {
        mouseOverHandler: function() {  
           this.log.html(this.config.mouseOverMessage);  
        }
    }  
};

jQuery('#foo').bind({
  'click': jQuery.proxy(app, 'clickHandler'),
  'mouseover': jQuery.proxy(app.nested.mouseOverHandler, app)
});

<h1 id="log">Waiting</h1>
<p id="foo">
    I am foo. <br/>Click me.
</p>