使用 User Agent 输出浏览器信息
Browser = (function(ua){ var b = { msie: /msie/.test(ua) && !/opera/.test(ua), opera: /opera/.test(ua), safari: /webkit/.test(ua) && !/chrome/.test(ua), firefox: /firefox/.test(ua), chrome: /chrome/.test(ua) }; var vMark = ""; for (var i in b) { if (b[i]) { vMark = "safari" == i ? "version" : i; break; } } b.version = vMark && RegExp("(?:" + vMark + ")[\\/: ]([\\d.]+)").test(ua) ? RegExp.$1 : "0"; b.ie = b.msie; b.ie6 = b.msie && parseInt(b.version, 10) == 6; b.ie7 = b.msie && parseInt(b.version, 10) == 7; b.ie8 = b.msie && parseInt(b.version, 10) == 8; return b; })(window.navigator.userAgent.toLowerCase());