获取浏览器名称与版本checkbrowse()

function checkbrowse() {
var ua = navigator.userAgent.toLowerCase();
var is = (ua.match(/(chrome|opera|safari|msie|firefox)/) || ['', 'mozilla'])[1];
var r = '(?:' + is + '|version)[\/: ]([\d.]+)';
var v = (ua.match(new RegExp(r)) || [])[1];
jQuery.browser.is = is;
jQuery.browser.ver = v;
return {
'is': jQuery.browser.is,
'ver': jQuery.browser.ver
}
}

var browserObj = checkbrowse();
console.log(browserObj);