如何检查鼠标是否在 jQuery 中的元素上?

有没有快速&在我缺少的 jQuery 中执行此操作的简单方法是什么?

Is there a quick & easy way to do this in jQuery that I'm missing?

我不想使用 mouseover 事件，因为我已经将它用于其他用途.我只需要知道鼠标在给定时刻是否在一个元素上.

I don't want to use the mouseover event because I'm already using it for something else. I just need to know if the mouse is over an element at a given moment.

我想做这样的事情，如果只有IsMouseOver"功能:

I'd like to do something like this, if only there was an "IsMouseOver" function:

function hideTip(oi) {
    setTimeout(function() { if (!IsMouseOver(oi)) $(oi).fadeOut(); }, 100);
}