checkBrowser.js

function checkBrowser(){
	var br={}
	var ua=navigator.userAgent.toLowerCase();
	var s;
	(s = ua.match(/chrome\/([\d.]+)/)) ? br.chrome = s[1] :
	(s = ua.match(/firefox\/([\d.]+)/)) ? br.firefox = s[1] :
	(s = ua.match(/msie ([\d.]+)/)) ? br.ie = s[1] :
	(s = ua.match(/net.*rv:([\d.]+)/)) ? br.ie = s[1] :
	(s = ua.match(/opera.([\d.]+)/)) ? br.opera = s[1] :
	(s = ua.match(/version\/([\d.]+).*safari/)) ? br.safari = s[1] : 0;

  var rt = '';
	if (br.ie) rt = 'IE: ' + br.ie;
	if (br.firefox) rt = 'Firefox: ' + br.firefox;
	if (br.chrome) rt = 'Chrome: ' + br.chrome;
	if (br.opera) rt = 'Opera: ' + br.opera;
	if (br.safari) rt = 'Safari: ' + br.safari;
	return rt
}