// ua.js - Detect Browser
// Requires JavaScript 1.1

// work around bug in xpcdom Mozilla 0.9.1
window.saveNavigator = window.navigator;

// Handy functions
function noop() {}
function noerror() { return true; }

function defaultOnError(msg, url, line)
{
   // customize this for your site
   if (top.location.href.indexOf('_files/errors/') == -1)
      top.location = '/evangelism/xbProjects/_files/errors/index.html?msg=' + escape(msg) + '&url=' + escape(url) + '&line=' + escape(line);
}

// Display Error page... 
// XXX: more work to be done here
//
function reportError(message)
{
   // customize this for your site
   if (top.location.href.indexOf('_files/errors/') == -1)
      top.location = '/evangelism/xbProjects/_files/errors/index.html?msg=' + escape(message);
}

function pageRequires(cond, msg, redirectTo)
{
   if (!cond)
   {
      msg = 'This page requires ' + msg;
      top.location = redirectTo + '?msg=' + escape(msg);
   }
   // return cond so can use in <A> onclick handlers to exclude browsers
   // from pages they do not support.
   return cond;
}

function detectBrowser()
{
   var oldOnError = window.onerror;
   var element = null;
   
   window.onerror = defaultOnError;

   navigator.OS      = '';
   navigator.version = 0;
   navigator.org     = '';
   navigator.family  = '';

   var platform;
   if (typeof(window.navigator.platform) != 'undefined')
   {
      platform = window.navigator.platform.toLowerCase();
      if (platform.indexOf('win') != -1)
         navigator.OS = 'win';
      else if (platform.indexOf('mac') != -1)
         navigator.OS = 'mac';
      else if (platform.indexOf('unix') != -1 || platform.indexOf('linux') != -1 || platform.indexOf('sun') != -1)
         navigator.OS = 'nix';
   }

   var i = 0;
   var ua = window.navigator.userAgent.toLowerCase();
   
   if (ua.indexOf('opera') != -1)
   {
      i = ua.indexOf('opera');
      navigator.family  = 'opera';
      navigator.org     = 'opera';
      navigator.version = parseFloat('0' + ua.substr(i+6), 10);
   }
   else if ((i = ua.indexOf('msie')) != -1)
   {
      navigator.org     = 'microsoft';
      navigator.version = parseFloat('0' + ua.substr(i+5), 10);
      
      if (navigator.version < 4)
         navigator.family = 'ie3';
      else
         navigator.family = 'ie4'
   }
   else if (typeof(window.controllers) != 'undefined' && typeof(window.locationbar) != 'undefined')
   {
      i = ua.lastIndexOf('/')
      navigator.version = parseFloat('0' + ua.substr(i+1), 10);
      navigator.family = 'gecko';

      if (ua.indexOf('netscape') != -1)
         navigator.org = 'netscape';
      else if (ua.indexOf('compuserve') != -1)
         navigator.org = 'compuserve';
      else
         navigator.org = 'mozilla';
   }
   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))
   {
       var is_major = parseFloat(navigator.appVersion);
    
      if (is_major < 4)
         navigator.version = is_major;
      else
      {
         i = ua.lastIndexOf('/')
         navigator.version = parseFloat('0' + ua.substr(i+1), 10);
      }
      navigator.org = 'netscape';
      navigator.family = 'nn' + parseInt(navigator.appVersion);
   }
   else if ((i = ua.indexOf('aol')) != -1 )
   {
      // aol
      navigator.family  = 'aol';
      navigator.org     = 'aol';
      navigator.version = parseFloat('0' + ua.substr(i+4), 10);
   }

   navigator.DOMCORE1   = (typeof(document.getElementsByTagName) != 'undefined' && typeof(document.createElement) != 'undefined');
   navigator.DOMCORE2   = (navigator.DOMCORE1 && typeof(document.getElementById) != 'undefined' && typeof(document.createElementNS) != 'undefined');
   navigator.DOMHTML = (navigator.DOMCORE1 && typeof(document.getElementById) != 'undefined');
   navigator.DOMCSS1 = ( (navigator.family == 'gecko') || (navigator.family == 'ie4') );

   navigator.DOMCSS2   = false;
   if (navigator.DOMCORE1)
   {
      element = document.createElement('p');
      navigator.DOMCSS2 = (typeof(element.style) == 'object');
   }

   navigator.DOMEVENTS  = (typeof(document.createEvent) != 'undefined');

   window.onerror = oldOnError;
}

detectBrowser();