Edit in JSFiddle

var MyView = Backbone.View.extend({
    events: {
        'click button': 'sayHi', //click is event, button is selector
        'mouseover button': 'aboutToSayHi'
    },
    sayHi: function () {
        console.log('hi');
    }, 
    aboutToSayHi: function () {
        console.log('over the button, almost about to click');
    }
});

var myViewInstance = new MyView({el: '#myView'});

<div id="myView"><button>sayHi</button></div>