//ie - Internet Explorer (All versions) 
//ie6 - Internet Explorer 6.x 
//ie5 - Internet Explorer 5.x 
//gecko - Mozilla, Firefox, Camino 
//opera - Opera (All versions) 
//opera8 - Opera 8.x 
//opera9 - Opera 9.x 
//konqueror - Konqueror 
//webkit or safari - Safari, NetNewsWire, OmniWeb, Shiira 
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;
}();