var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName  = navigator.appName;
var fullVersion  = ''+parseFloat(navigator.appVersion);
var majorVersion = parseInt(navigator.appVersion,10);
var nameOffset,verOffset,ix;

var name = navigator.appName;
nVer = nVer.substring(0,1);

if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
browserName = "Microsoft Internet Explorer";
fullVersion = nAgt.substring(verOffset+5);
}
else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
browserName = "Chrome";
fullVersion = nAgt.substring(verOffset+7);
}
else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) {
browserName = "Firefox";
fullVersion = nAgt.substring(verOffset+8);
}
else if ((verOffset=nAgt.indexOf("Safari"))!=-1) {
browserName = "Safari";
fullVersion = nAgt.substring(verOffset+5);
}

if ((ix=fullVersion.indexOf(";"))!=-1) fullVersion=fullVersion.substring(0,ix);
if ((ix=fullVersion.indexOf(" "))!=-1) fullVersion=fullVersion.substring(0,ix);

majorVersion = parseInt(''+fullVersion,10);
if (isNaN(majorVersion)) {
fullVersion  = ''+parseFloat(navigator.appVersion);
majorVersion = parseInt(navigator.appVersion,10);
}

if (browserName == "Microsoft Internet Explorer" && majorVersion < 8){
url="brs_update/index.html";
}
else if (browserName == "Firefox" && majorVersion < 3){
url="brs_update/index.html";
}
else if (browserName == "Opera" && majorVersion < 9){
url="brs_update/index.html";
}
else if (browserName == "Safari" && majorVersion < 3){
url="brs_update/index.html";
}

window.location=url;