尝试:

$(".star_5").trigger('mouseover');

这将触发鼠标悬停操作，无论它发生在什么地方，而不是模拟它，从而提供了一种针对将来的措施，以防止更改鼠标悬停处理程序.

This will trigger the mouseover action whatever it happens to be, rather than emulating it, offering a measure of future-proofing against changes to the mouseover handler.