YUI().use('button', function(Y){

var buttonA = new Y.Button({

srcNode:'#myButton',

});

buttonA.getNode().on('click', function(){

alert("Hello!");

})

var buttonB = new Y.Button({

srcNode:'#myToggleButton',

type: 'toggle'

});

buttonB.after('selectedChange', function (b) {

var button = this;

if (button.get('selected')) {

button.set('label', 'I am selected');

}

else {

button.set('label', 'I am not selected');

}

});

});