JavaScript detection Browser version number (IE6,IE7,IE8,FF)

Source: Internet
Author: User
The code is as follows Copy Code
function Mybrowser () {
var useragent = navigator.useragent; Gets the useragent string for the browser
var Isopera = Useragent.indexof ("Opera") >-1; Judge whether Opera browser
var Isie = Useragent.indexof ("compatible") >-1 && useragent.indexof ("MSIE") >-1 &&!isopera; Determine if IE browser
var ISFF = Useragent.indexof ("Firefox") >-1; Determine if the Firefox browser
var Issafari = Useragent.indexof ("Safari") >-1; Determine if Safari browser


if (Isie) {
var IE5 = IE55 = IE6 = IE7 = IE8 = false;
var reie = new RegExp ("MSIE (\d+\.\d+);");
Reie.test (useragent);
var fieversion = parsefloat (regexp["$");

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";}

}//mybrowser () End


Here is the function called above

The code is as follows Copy Code
if (mybrowser () = = "FF") {alert ("I am Firefox");}
if (mybrowser () = = "Opera") {alert ("I am Opera");}
if (mybrowser () = = "Safari") {alert ("I am Safari");}

if (mybrowser () = = "IE55") {alert ("I am IE5.5");}
if (mybrowser () = = "IE6") {alert ("I am IE6");}
if (mybrowser () = = "IE7") {alert ("I am IE7");}
if (mybrowser () = = "IE8") {alert ("I am IE8");}

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