Javascript Browser Detection

browser_dedect.js

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "Other";
		this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "Unknown";
	},
	searchString: function (data) {
		for (var i = 0; i < data.length; i++) {
			var dataString = data[i].string;
			this.versionSearchString = data[i].subString;

			if (dataString.indexOf(data[i].subString) !== -1) {
				return data[i].identity;
			}
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index === -1) {
			return;
		}

		var rv = dataString.indexOf("rv:");
		if (this.versionSearchString === "Trident" && rv !== -1) {
			return parseFloat(dataString.substring(rv + 3));
		} else {
			return parseFloat(dataString.substring(index + this.versionSearchString.length + 1));
		}
	},

	dataBrowser: [
		{string: navigator.userAgent, subString: "Chrome", identity: "Chrome"},
		{string: navigator.userAgent, subString: "MSIE", identity: "Explorer"},
		{string: navigator.userAgent, subString: "Trident", identity: "Explorer"},
		{string: navigator.userAgent, subString: "Firefox", identity: "Firefox"},
		{string: navigator.userAgent, subString: "Safari", identity: "Safari"},
		{string: navigator.userAgent, subString: "Opera", identity: "Opera"}
	]

};

BrowserDetect.init();
//console.log("Using <b>" + BrowserDetect.browser + "</b> with version <b>" + BrowserDetect.version + "</b>");