Display Browser and Version

This is jQuery specific, and contains a bit of a hack/fix for dealing with Chrome. This works between jQuery 1.5.1 and jQuery 1.8.3. It's gone in jQuery 1.9. Presumably because it was used too improperly too frequently and it was hurting the web. Better to feature detect when possible.

var userAgent = navigator.userAgent.toLowerCase(),
    browser   = '',
    version   = 0;

$.browser.chrome = /chrome/.test(navigator.userAgent.toLowerCase());

// Is this a version of IE?
if ($.browser.msie) {
  userAgent = $.browser.version;
  userAgent = userAgent.substring(0,userAgent.indexOf('.')); 
  version = userAgent;
  browser = "Internet Explorer";
}

// Is this a version of Chrome?
if ($.browser.chrome) {
  userAgent = userAgent.substring(userAgent.indexOf('chrome/') + 7);
  userAgent = userAgent.substring(0,userAgent.indexOf('.')); 
  version = userAgent;
  // If it is chrome then jQuery thinks it's safari so we have to tell it it isn't
  $.browser.safari = false;
  browser = "Chrome";
}

// Is this a version of Safari?
if ($.browser.safari) {
  userAgent = userAgent.substring(userAgent.indexOf('safari/') + 7); 
  userAgent = userAgent.substring(0,userAgent.indexOf('.'));
  version = userAgent; 
  browser = "Safari";
}

// Is this a version of Mozilla?
if ($.browser.mozilla) {
 //Is it Firefox?
 if (navigator.userAgent.toLowerCase().indexOf('firefox') != -1) {
  userAgent = userAgent.substring(userAgent.indexOf('firefox/') + 8);
  userAgent = userAgent.substring(0,userAgent.indexOf('.'));
  version = userAgent;
  browser = "Firefox"
 }
 // If not then it must be another Mozilla
 else {
   browser = "Mozilla (not Firefox)"
 }
}

// Is this a version of Opera?
if ($.browser.opera) {
 userAgent = userAgent.substring(userAgent.indexOf('version/') + 8);
 userAgent = userAgent.substring(0,userAgent.indexOf('.'));
 version = userAgent;
 browser = "Opera";
}

// Now you have two variables, browser and version
// which have the right info