基于浏览器使用Javascript切换样式表

I'm currently trying to edit a website for a client which uses Adobe Contribute so it uses a different stylesheet if the user is browsing from a mobile phone. The mobile phone stylesheet is much simpler and strips out background images and styles to reduce load time. I understand it would be better practice to have a completely seperate website for the mobile, but this is not practical for the client as he needs to be able to update his websites content using Contribute.I'm currently trying to edit a website for a cl