大家可以看到在下载ACTIVEX控件时IE通常会弹出一个对话框问是否容许下载并执行该ACTIVEX控件,如果用户点否则控件无法下载,那我后面JS对控件方法的调用肯定会出错,如何避免这个问题呢?是否可以在调用方法之前用JS判断一下呢?请看我下面的讲解? -We can see that in the download ACTIVEX control when IE will usually pop up a dialog box asking whether to allow download and implementation of the ACTIVEX control, if the user control point it can not be downloaded, I JS right behind the call control methods sure to be wrong, how to avoid this problem of whether we can call methods before using JS judgment? Look at what I explain below