var exampleCallback = function() {

console.log('Order complete!');

};

window.EBWidgets.createWidget({

// Required

widgetType: 'checkout',

eventId: '129594840657',

iframeContainerId: 'eventbrite-widget-container-129594840657',

// Optional

iframeContainerHeight: 425, // Widget height in pixels. Defaults to a minimum of 425px if not provided

onOrderComplete: exampleCallback // Method called when an order has successfully completed

});