Fire an event manually

When sometimes you have to fire an event manually, here comes the approach.

    function fire_event(element, event) {
    var evt;
    if (document.createEvent) {
    // dispatch for firefox + others
    evt = document.createEvent("HTMLEvents");
    evt.initEvent(event, true, true ); // event type,bubbling,cancelable
    return !element.dispatchEvent(evt);
    } else if(document.createEventObject) {
    // dispatch for IE
    evt = document.createEventObject();
    return element.fireEvent('on'+event, evt);
    } else {
    return false;
    }
    }

注意本段代码仅供参考。相当一部分事件并不是直接加上‘on’就在IE下直接可用的。