js 判断浏览器类型

navigator.userAgent

navigator.userAgent

navigator.userAgent

navigator.userAgent

navigator.userAgent

navigator.userAgent

ie:

"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2)"

chrome:

"Mozilla/5.0
(Windows NT 5.2) AppleWebKit/537.13 (KHTML, like Gecko) Chrome/24.0.1284.2 Safari/537.13"

firefox:

"Mozilla/5.0 (Windows NT 5.2; rv:17.0) Gecko/17.0 Firefox/17.0"

function btnlogin()

{

if(navigator.userAgent.indexOf("MSIE")>0)
{

return "MSIE";

}

if(navigator.userAgent.indexOf("Firefox")>0){

return "Firefox";

}

if(navigator.userAgent.indexOf("Opera")>0){

return "Opera";

}

if(navigator.userAgent.indexOf("Safari")>0)
{

return "Safari";

}

if(navigator.userAgent.indexOf("Camino")>0){

return "Camino";

}

if(navigator.userAgent.indexOf("Gecko")>0){

return "Gecko";

}

if(navigator.userAgent.indexOf("Chrome")>0){

return "Chrome";

}

}