Javascript: BrowserDetect

browser_detect.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;
		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: "Firefox",
		identity: "Firefox"
	}, {
		string: navigator.userAgent,
		subString: "Safari",
		identity: "Safari"
	}, {
		string: navigator.userAgent,
		subString: "Opera",
		identity: "Opera"
	}, ]

};