jQuery has the ability to identify what browser your users are using to visit your site.  It may be more useful to use CSS conditional comments to detect a browser, jQuery makes it very easy:


if( $.browser.safari ) {
  alert('You are using Safari');
} else if( $.browser.msie && $.browser.version > 6 ) {
  alert('You are using a modern version of Internet Explorer');
} else if( $.browser.msie && $.browser.version <= 6 ) {
  alert('You really really need to upgrade your browser');
} else if( $.browser.mozilla && $.browser.version >= "1.8" ) {
  alert('You are using Firefox version greater than 1.8');
}