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':'';
	if(b == 'gecko') {
	    b += is('firefox/2') ? ' firefox/2' : '';
	}
    var c = b + os + ' js';
    h.className += h.className ? ' ' + c : c;
}();