I have the following html:

<span onclick=alert('Boem')>

    <button id=test1>test</button>

</span>

When I call the following javascript:

$('#test1').trigger('click');

The onclick event is triggered twice, while I expect it to just trigger once. Because JQuery should look up in the DOM tree and find only one onclick.

I do not have control of the span, it is generated in a third party tool. I do have control over the button and his parameters.

You can find a JSFiddle example here:
http://jsfiddle.net/Voga/v4100zke/

Update

I do not know the contents of the onclick listener of the span. This is also generated by the 3rd party tool. I want the click trigger to execute this onclick like it does now, but only once.