function css_browser_selector(u)
{
	var ua=u.toLowerCase(),is =function(t)
	{
		return ua.indexOf(t)>-1
	},
	g = 'gecko',
	w = 'webkit',
	s = 'safari',
	o = 'opera',
	m = 'mobile',
	h = document.documentElement,
	b = [
			(!(/opera|webtv/i.test(ua))&&/msie\s(\d)/.test(ua))?('ie ie'+RegExp.$1):
			is('firefox/2')? g+' ff2':
			is('firefox/3.5')?g+' ff3 ff3_5':
			is('firefox/3.6')?g+' ff3 ff3_6':
			is('firefox/3')?g+' ff3':
			is('gecko/')?g:
			is('opera')?o+(/version\/(\d+)/.test(ua)?' '+o+RegExp.$1:
			(/opera(\s|\/)(\d+)/.test(ua)?' '+o+RegExp.$2:'')):
			is('konqueror')?'konqueror':
			is('blackberry')?m+' blackberry':
			is('android')?m+' android':
			is('chrome')?w+' chrome':
			is('iron')?w+' iron':
			is('applewebkit/')?w+' '+s+(/version\/(\d+)/.test(ua)?' '+s+RegExp.$1:''):
			is('mozilla/')?g:'',is('j2me')?m+' j2me':
			is('iphone')?m+' iphone':
			is('ipod')?m+' ipod':
			is('ipad')?m+' ipad':
			is('mac')?'mac':
			is('darwin')?'mac':
			is('webtv')?'webtv':
			is('win')?'win'+(is('windows nt 6.0')?' vista':''):
			is('freebsd')?'freebsd':(is('x11')||is('linux'))?'linux':'','js'
		];

		c = b.join(' ');
		h.className += ' '+c; return c;
};

$(document).ready(function()
{
	$('div').addClass(' ' + css_browser_selector(navigator.userAgent));
});