JS 判断浏览器部类

JS 判断浏览器类型
// JS  判断浏览器类型
function showNode(oid){
        var Sys = {};
        var ua = navigator.userAgent.toLowerCase();
        var s;
        (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
        (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
        (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
        (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
        (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

        var cssdisplay;
        if (Sys.ie) cssdisplay='block';
        if (Sys.firefox) cssdisplay='table-row';
        if (Sys.chrome) cssdisplay='table-row';
        if (Sys.opera) cssdisplay='table-row';
        if (Sys.safari) cssdisplay='table-row';

        ...
}