实际上改变你的样式表是相当具有挑战性的。更容易，但您可以切换不同的样式表，这可能已经足够您的目的。请参见如何使用jQuery切换CSS样式表？。

Actually altering your stylesheet is pretty challenging. Much more easily, though, you can switch out your stylesheet for a different one, which may be sufficient for your purposes. See How do I switch my CSS stylesheet using jQuery?.

要实际更改样式表内容，请如何在运行时更改/删除CSS类定义？将让你开始。

For actually altering the stylesheet content, How to change/remove CSS classes definitions at runtime? will get you started.