Recently,I'm translating a article about Javascript,the below hightlighted sentence confuse me

To make ev contain the event object in every browser we OR it with window.event. In Firefox the " || window.event" will be ignored since ev already contains the event. In MSIE ev is null so it will get set to window.event.

Thanks and regards

ev在所有浏览器环境中都包含了event对象。
在Firefox里，"||window.event"将被忽略，因为它已经包含事件。在IE中，ev的值为空，以至于需要将它的值设置为window.event。
你是在看Mark Kahn所写的http://www.webreference.com/prog ... t/mk/column2/3.html么?关于实现JS拖放的?
好吧.......我是JS白痴.....

要想让 ev (dknt注:这个应该是一个变量) 在所有浏览器中都能获得 event 对象，我们就用 OR 把它和 window.event '或'一下(dknt注:他的意思让你写成 ev = ev || window.event )。 在 Firefox 中 " || window.event " 将被忽略，因为 ev 已经就是那个对象了( dknt注: 其实就是短路求值的意思)。而在MSIE中，ev 是 null，所以会被设成 window.event 的值 ( dknt注: ev = null || window.event, so ev = window.event )。

Thank for both of  your response for this.

To:LuoboTixs

Yes,I'm reading the article posted by Mark Kahn.The article is demonstrating how to drag and drop objects.I think it's valuable and  decide to transite it into Chinese Version.

http://www.w3cpro.cn/article/javascript/185.html
Yet one Simplified-Chinese version was released.
It is suggested that you may get some more sprites

引用:

原帖由 dknt 于 2007-5-7 21:00 发表
要想让 ev (dknt注:这个应该是一个变量) 在所有浏览器中都能获得 event 对象，我们就用 OR 把它和 window.event '或'一下(dknt注:他的意思让你写成 ev = ev || window.event )。 在 Firefox 中 " || window.eve ...

不懂JS。意思应该就是dknt所表述的这样吧~