Clang website menu

Hello,
  I saw that when open http://clang.llvm.org/ in relatively small
monitor (like laptop lcd) the website menu is partly invisible and I
cannot scroll (see
attachment). I saw that menu.css can to be changed to:
[id="menu"] {
float:left;
position:relative;
width:25ex;
}
and it works
Best regards,
Vassil Vassilev