fireClickEvent.js

function fireClickEvent(el) {
    var event;
    
    // phantomjs目不支持new Event()的形式：https://github.com/ariya/phantomjs/issues/11289
    if (document.createEvent) {
        event = document.createEvent('MouseEvent');
        event.initEvent('click', true, true);
        el.dispatchEvent(event);
    }
    else if (el.fireEvent) {
        event = document.createEventObject();
        el.fireEvent('onclick', event);
    }
}