// from http://www.quirksmode.org/js/detect.html

function get_browser_info() {
	var BrowserDetect = {
		init: function () {
			this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
			this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
			this.OS = this.searchString(this.dataOS) || "an unknown OS";
		},
		searchString: function (data) {
			for (var i=0;i<data.length;i++)	{
				var dataString = data[i].string;
				var dataProp = data[i].prop;
				this.versionSearchString = data[i].versionSearch || data[i].identity;
				if (dataString) {
					if (dataString.indexOf(data[i].subString) != -1)
						return data[i].identity;
				}
				else if (dataProp)
					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: "OmniWeb",
					  versionSearch: "OmniWeb/",
					  identity: "OmniWeb"
					  },
					  {
					  string: navigator.vendor,
					  subString: "Apple",
					  identity: "Safari",
					  versionSearch: "Version"
					  },
					  {
					  prop: window.opera,
					  identity: "Opera"
					  },
					  {
					  string: navigator.vendor,
					  subString: "iCab",
					  identity: "iCab"
					  },
					  {
					  string: navigator.vendor,
					  subString: "KDE",
					  identity: "Konqueror"
					  },
					  {
					  string: navigator.userAgent,
					  subString: "Firefox",
					  identity: "Firefox"
					  },
					  {
					  string: navigator.vendor,
					  subString: "Camino",
					  identity: "Camino"
					  },
					  {		// for newer Netscapes (6+)
					  string: navigator.userAgent,
					  subString: "Netscape",
					  identity: "Netscape"
					  },
					  {
					  string: navigator.userAgent,
					  subString: "MSIE",
					  identity: "Explorer",
					  versionSearch: "MSIE"
					  },
					  {
					  string: navigator.userAgent,
					  subString: "Gecko",
					  identity: "Mozilla",
					  versionSearch: "rv"
					  },
					  { 		// for older Netscapes (4-)
					  string: navigator.userAgent,
					  subString: "Mozilla",
					  identity: "Netscape",
					  versionSearch: "Mozilla"
					  }
					  ],
			dataOS : [
					  {
					  string: navigator.platform,
					  subString: "Win",
					  identity: "Windows"
					  },
					  {
					  string: navigator.platform,
					  subString: "Mac",
					  identity: "Mac"
					  },
					  {
					  string: navigator.userAgent,
					  subString: "iPhone",
					  identity: "iPhone/iPod"
					  },
					  {
					  string: navigator.platform,
					  subString: "Linux",
					  identity: "Linux"
					  }
					  ]
			
	};
	BrowserDetect.init();
	return BrowserDetect;
}