How to determine browser version with jQuery

varmatched, browser;
jQuery.uaMatch =function( ua ) {
  ua = ua.toLowerCase();
  varmatch = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
    /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
    /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
    /(msie) ([\w.]+)/.exec( ua ) ||
    ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
    [];
  return{
    browser: match[ 1 ] ||"",
    version: match[ 2 ] ||"0"
  };
};
matched = jQuery.uaMatch( navigator.userAgent );
browser = {};
if( matched.browser ) {
  browser[ matched.browser ] =true;
  browser.version = matched.version;
}
// Chrome is Webkit, but Webkit is also Safari.
if( browser.chrome ) {
  browser.webkit =true;
}elseif( browser.webkit ) {
  browser.safari =true;
}
jQuery.browser = browser;
//下面是直接写的判断，上面jq的获取方法
if(matched.browser =='mozilla') {
  $('#Online-message .liuyan').css({'padding-left':'0px','padding-right':'0px'})
}

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