很抱歉，如果这是一个常见问题，但我无法通过搜索找到任何似乎相关的答案.
Sorry if this is a common question, but I couldn't find any answers that seemed pertinent through searching.
如果我像这样附加一个事件监听器:
If I attach an event listener like this:
window.addEventListener('scroll', function() { check_pos(box); }, false);
稍后尝试将其删除似乎不起作用，如下所示:
it doesn't seem to work to try to remove it later, like this:
window.removeEventListener('scroll', function() { check_pos(box); }, false);
我认为这是因为 addEventListener 和 removeEventListener 方法想要引用相同的函数，而我为它们提供了匿名函数，虽然它们在代码，实际上并不相同.
I assume this is because the addEventListener and removeEventListener methods want a reference to the same function, while I've provided them with anonymous functions, which, while identical in code, are not literally the same.
如何更改我的代码以使对 removeEventListener 的调用正常工作?box"参数指的是我在屏幕上跟踪的 <iframe> 的名称；也就是说，我希望能够为我拥有的每个