javascript 触发HTML元素绑定的函数

代码如下:
if (document.createEvent) {
var clickEvent = document.createEvent("MouseEvents");
clickEvent.initEvent("click", false, true);
this.fileEl.dom.dispatchEvent(clickEvent);//ff
} else if (document.createEventObject) {
this.fileEl.dom.fireEvent("onclick", document.createEventObject(e.browserEvent));//ie
}