JQUERY Browser DETECT

var is_chrome = /chrome/.test( navigator.userAgent.

toLowerCase() );
var is_mozilla = /mozilla/.test( navigator.userAgent.toLowerCase() ) && !/(compatible|webkit)/.test( navigator.userAgent.toLowerCase() );
var is_safari=/webkit/.test( navigator.userAgent.toLowerCase() ) && !/chrome/.test( navigator.userAgent.toLowerCase() );
var is_msie=/msie/.test( navigator.userAgent.toLowerCase() ) && !/opera/.test( navigator.userAgent.toLowerCase() );
var userAgent = navigator.userAgent.toLowerCase();

// Figure out what browser is being used
jQuery.browser = {
version: (userAgent.match( /.+(?:rv|it|ra|ie|me)[\/: ]([\d.]+)/ ) || [])[1],
chrome: /chrome/.test( userAgent ),
safari: /webkit/.test( userAgent ) && !/chrome/.test( userAgent ),
opera: /opera/.test( userAgent ),
msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
};