if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Firefox/x.x or Firefox x.x (ignoring remaining digits);
 var ffversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ffversion>=3.1)
  document.write("")
 else if (ffversion>=3)

document.location.href="http://www.s-kuste.com/home/oldff.html";
 else if (ffversion>=2)
  document.location.href="http://www.s-kuste.com/home/oldff.html";}
else

;