var userAgent = navigator.userAgent;
var browserName = "";

if(userAgent.indexOf('MSIE') >= 0)
	browserName = "ie";
else if(userAgent.indexOf('Safari') >= 0)
	browserName = "Safari";
else if(userAgent.indexOf('Chrome') >= 0)
	browserName = "Chrome";
else if(userAgent.indexOf('Firefox') >= 0)
	browserName = "Firefox";