http://www.snowelm.com/~t/scripts/ua.js

1/*
2ua.js 2001-12-05
3
4Contributor(s): Bob Clary, Netscape Communications, Copyright 2001
5
6Netscape grants you a royalty free license to use or modify this
7software provided that this copyright notice appears on all copies.
8This software is provided "AS IS," without a warranty of any kind.
9*/
10
11function xbDetectBrowser()
12{
13  var oldOnError = window.onerror;
14  var element = null;
15
16  window.onerror = null;
17  
18  // work around bug in xpcdom Mozilla 0.9.1
19  window.saveNavigator = window.navigator;
20
21  navigator.OS    = '';
22  navigator.version  = parseFloat(navigator.appVersion);
23  navigator.org    = '';
24  navigator.family  = '';
25
26  var platform;
27  if (typeof(window.navigator.platform) != 'undefined')
28  {
29    platform = window.navigator.platform.toLowerCase();
30    if (platform.indexOf('win') != -1)
31      navigator.OS = 'win';
32    else if (platform.indexOf('mac') != -1)
33      navigator.OS = 'mac';
34    else if (platform.indexOf('unix') != -1 || platform.indexOf('linux') != -1 || platform.indexOf('sun') != -1)
35      navigator.OS = 'nix';
36  }
37
38  var i = 0;
39  var ua = window.navigator.userAgent.toLowerCase();
40  
41  if (ua.indexOf('opera') != -1)
42  {
43    i = ua.indexOf('opera');
44    navigator.family  = 'opera';
45    navigator.org    = 'opera';
46    navigator.version  = parseFloat('0' + ua.substr(i+6), 10);
47  }
48  else if ((i = ua.indexOf('msie')) != -1)
49  {
50    navigator.org    = 'microsoft';
51    navigator.version  = parseFloat('0' + ua.substr(i+5), 10);
52    
53    if (navigator.version < 4)
54      navigator.family = 'ie3';
55    else
56      navigator.family = 'ie4'
57  }
58  else if (ua.indexOf('gecko') != -1)
59  {
60    navigator.family = 'gecko';
61    var rvStart = navigator.userAgent.indexOf('rv:') + 3;
62    var rvEnd = navigator.userAgent.indexOf(')', rvStart);

63    var rv = navigator.userAgent.substring(rvStart, rvEnd);
64    var decIndex = rv.indexOf('.');
65    if (decIndex != -1)
66    {
67      rv = rv.replace(/\./g, '')
68      rv = rv.substring(0, decIndex-1) + '.' + rv.substr(decIndex)
69    }
70    navigator.version = parseFloat(rv);
71
72    if (ua.indexOf('netscape') != -1)
73      navigator.org = 'netscape';
74    else if (ua.indexOf('compuserve') != -1)
75      navigator.org = 'compuserve';
76    else
77      navigator.org = 'mozilla';
78  }
79  else if ((ua.indexOf('mozilla') !=-1) && (ua.indexOf('spoofer')==-1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('opera')==-1)&& (ua.indexOf('webtv')==-1) && (ua.indexOf('hotjava')==-1))
80  {
81    var is_major = parseFloat(navigator.appVersion);
82    
83    if (is_major < 4)
84      navigator.version = is_major;
85    else
86    {
87      i = ua.lastIndexOf('/')
88      navigator.version = parseFloat('0' + ua.substr(i+1), 10);
89    }
90    navigator.org = 'netscape';
91    navigator.family = 'nn' + parseInt(navigator.appVersion);
92  }
93  else if ((i = ua.indexOf('aol')) != -1 )
94  {
95    // aol
96    navigator.family  = 'aol';
97    navigator.org    = 'aol';
98    navigator.version  = parseFloat('0' + ua.substr(i+4), 10);
99  }
100  else if ((i = ua.indexOf('hotjava')) != -1 )
101  {
102    // hotjava
103    navigator.family  = 'hotjava';
104    navigator.org    = 'sun';
105    navigator.version  = parseFloat(navigator.appVersion);
106  }
107
108  window.onerror = oldOnError;
109}
110
111xbDetectBrowser();
112