sfHover = function() {
  var sfEls = document.getElementById("nav").getElementsByTagName("LI");
  for (var i=0; i<sfEls.length; i++) {
    sfEls[i].onmouseover=function() {
      this.className+=" hover";
    }
    sfEls[i].onmouseout=function() {
      this.className=this.className.replace(new RegExp(" hover\\b"), "");
    }
  }
}

var css_browser_selector = function() {
  var 
    ua=navigator.userAgent.toLowerCase(),
    is=function(t){ return ua.indexOf(t) != -1; },
    h=document.getElementsByTagName('html')[0],
    b=(!(/opera|webtv/i.test(ua))&&/msie (\d)/.test(ua))?('ie ie'+RegExp.$1):is('gecko/')? 'gecko':is('opera/9')?'opera opera9':/opera (\d)/.test(ua)?'opera opera'+RegExp.$1:is('konqueror')?'konqueror':is('applewebkit/')?'webkit safari':is('mozilla/')?'gecko':'',
    os=(is('x11')||is('linux'))?' linux':is('mac')?' mac':is('win')?' win':'';
  var c=b+os+' js';
  h.className += h.className?' '+c:c;
}();

if (window.attachEvent) window.attachEvent("onload", sfHover);