I'm trying to set the width's for the border using jQuery, so it'll be adjusted to the screensize.

What I'm using right now is: 

```
$("#content").css("border-bottom-width", "(1/20)*theHeight", "border-right-width", "(1/10)*theWidth", "border-left-width", "(1/10)*theWidth", "border-top-width", "0");

```

But this does not seem to do the trick. I know values theHeight and theWidth are filled, so that can't be the problem. 

What am I doing wrong? If it's a really lame bug then I'm really sorry for being such a noob.