这是一个黑客：在内部div中添加一个类似O的CHAR，然后给它一个巨大的字体大小（取决于你想要跨越的区域）：

Here's a hack: add an CHAR like "O" to the inner div, and then give it an enormous font size(depends on the area you want to span over):

#divInner { /* ... */; font-size: 1000px; color: transparent; }

（我认为也设置为溢出：隐藏。）

(Also set "overflow: hidden" I think.)

IE喜欢容器中有东西可以让点击影响。如果它只是完全为空，它会忽略点击。

IE likes there to be something there in the container for the click to affect. If it's just completely empty, it ignores clicks.

小提琴： https://jsfiddle.net/cbnk8wrk/1/ （在IE中观看！）

a fiddle: https://jsfiddle.net/cbnk8wrk/1/ (watch in IE!)