jQuery programatically set options of dropdowns

Question

I am lost, please take a look at http://www.austrokamin.at/edelstahlkamine/edelstahlkamin-doppelwandig/bodenplatte-dw.html

I need to set the two dropdowns with jQuery. For example:

jQuery('#product-options-wrapper .input-box select').eq(0).prop('selectedIndex', 2);

No Problem so far. But now some event handler(s) must be triggered so that the second dropdown is activated.

When i select the element in Firebug and type getEventListeners(0ドル) it tells me "blur", "focus" and "change"

I fired all of these events in the console with:

jQuery('#product-options-wrapper .input-box select').eq(0).focus();
jQuery('#product-options-wrapper .input-box select').eq(0).change();
jQuery('#product-options-wrapper .input-box select').eq(0).blur();

but nothing seems to have effect. Can anyone help me please.

Answer 1

You can use this js code and then just call $$('#product-options-wrapper .input-box select')[0].simulate('change')

[EDIT]
here is the original code. In case it gets removed from github.
The code is not mine. Kudos to kangax

/**
 * Event.simulate(@element, eventName[, options]) -> Element
 * 
 * - @element: element to fire event on
 * - eventName: name of event to fire (only MouseEvents and HTMLEvents interfaces are supported)
 * - options: optional object to fine-tune event properties - pointerX, pointerY, ctrlKey, etc.
 *
 * $('foo').simulate('click'); // => fires "click" event on an element with id=foo
 *
 **/
(function(){
 var eventMatchers = {
 'HTMLEvents': /^(?:load|unload|abort|error|select|change|submit|reset|focus|blur|resize|scroll)$/,
 'MouseEvents': /^(?:click|mouse(?:down|up|over|move|out))$/
 }
 var defaultOptions = {
 pointerX: 0,
 pointerY: 0,
 button: 0,
 ctrlKey: false,
 altKey: false,
 shiftKey: false,
 metaKey: false,
 bubbles: true,
 cancelable: true
 }
 Event.simulate = function(element, eventName) {
 var options = Object.extend(defaultOptions, arguments[2] || { });
 var oEvent, eventType = null;
 element = $(element);
 for (var name in eventMatchers) {
 if (eventMatchers[name].test(eventName)) { eventType = name; break; }
 }
 if (!eventType)
 throw new SyntaxError('Only HTMLEvents and MouseEvents interfaces are supported');
 if (document.createEvent) {
 oEvent = document.createEvent(eventType);
 if (eventType == 'HTMLEvents') {
 oEvent.initEvent(eventName, options.bubbles, options.cancelable);
 }
 else {
 oEvent.initMouseEvent(eventName, options.bubbles, options.cancelable, document.defaultView, 
 options.button, options.pointerX, options.pointerY, options.pointerX, options.pointerY,
 options.ctrlKey, options.altKey, options.shiftKey, options.metaKey, options.button, element);
 }
 element.dispatchEvent(oEvent);
 }
 else {
 options.clientX = options.pointerX;
 options.clientY = options.pointerY;
 oEvent = Object.extend(document.createEventObject(), options);
 element.fireEvent('on' + eventName, oEvent);
 }
 return element;
 }
 Element.addMethods({ simulate: Event.simulate });
})()