Browser Detect (Netscape – Mozilla)

Hey im working on a browser detect script for my .css imports here is the script

[code=php]<script type=”text/javascript” language=”javascript”>
BrowserDescription = function () {
this.appN = navigator.appName.toLowerCase();
this.appV = parseInt(navigator.appVersion);
this.ua = navigator.userAgent.toLowerCase();
this.plt = navigator.platform.toLowerCase();
if (this.ua.indexOf(‘opera/7’) != -1 || this.ua.indexOf(‘opera 7’) != -1) {
this.appV = 7;
}
if (this.appN.indexOf(‘netscape’) != -1) {
document.write(“<link href=SignsNS.css rel=stylesheet type=text/css media=screen>”);
}
if (this.appN.indexOf(‘microsoft internet explorer’) != -1) {
document.write(“<link href=Signs.css rel=stylesheet type=text/css media=screen>”);
}
document.write(“this.appN(Name) = &nbsp;”, this.appN, “<br>”, “this.appV(Version) = &nbsp;”, this.appV, “<br>”, “this.ua(userAgent) =

&nbsp;”, this.ua, “<br>”, “this.plt(Platform) = &nbsp;”, this.plt);
}
var browser = new BrowserDescription();
</script>[/code]

here is the results for mozilla
this.appN(Name) = netscape
this.appV(Version) = 5
this.ua(userAgent) = mozilla/5.0 (windows; u; winnt4.0; en-us; rv:1.6) gecko/20040113
this.plt(Platform) = win32

and netscape
this.appN(Name) = netscape
this.appV(Version) = 5
this.ua(userAgent) = mozilla/5.0 (windows; u; winnt4.0; en-us; rv:1.4) gecko/20030624 netscape/7.1 (ax)
this.plt(Platform) = win32

so im guessing that i’d have to use this.ua to tell the difference between the both but then there is a problem with the versions cause i could put
if {this.ua = mozilla/5.0 (windows; u; winnt4.0; en-us; rv:1.6) gecko/20040113
then use mozilla css
if {this.ua = mozilla/5.0 (windows; u; winnt4.0; en-us; rv:1.4) gecko/20030624 netscape/7.1 (ax)}
then use netscape css

is there a better way?

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