JS检测浏览器类型

function myBrowser(){

var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串

var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器

var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera ; //判断是否IE浏览器

var isFF = userAgent.indexOf("Firefox") > -1 ; //判断是否Firefox浏览器

var isSafari = userAgent.indexOf("Safari") > -1 ; //判断是否Safari浏览器

if(isIE){

var IE5 = IE55 = IE6 = IE7 = IE8 = false;

var reIE = new RegExp("MSIE (\\d+\\.\\d+);");

reIE.test(userAgent);

var fIEVersion = parseFloat(RegExp["$1"]);

IE55 = fIEVersion == 5.5 ;

IE6 = fIEVersion == 6.0 ;

IE7 = fIEVersion == 7.0 ;

IE8 = fIEVersion == 8.0 ;

if(IE55){ return "IE55"; }

if(IE6){ return "IE6"; }

if(IE7){ return "IE7"; }

if(IE8){ return "IE8"; }

}//isIE end

if(isFF){ return "FF"; }

if(isOpera){ return "Opera"; }

}