(function() {
	
	var BrowserDetect = {
		init: function () {
			this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
			this.browserVersion = this.searchVersion(navigator.userAgent) ||
							  this.searchVersion(navigator.appVersion) || "an unknown version";
			this.engine = this.searchString(this.dataEngine) || "An unknown engine";
			this.engineVersion = this.searchVersion(navigator.userAgent) ||
							 this.searchVersion(navigator.appVersion) || "an unknown version";
			this.OS = this.searchString(this.dataOS) || "an unknown OS";
			this.setCSS();
		},
		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;
			}
		},
		setCSS : function() {
			var html = document.getElementsByTagName('html')[0];
			var className = html.className;
			className += ' ' + this.browser;
			className += ' ' + this.browser + this.browserVersion;
			className += ' ' + this.engine;
			className += ' ' + this.engine + this.engineVersion;
			className += ' ' + this.OS;
			className += ' js';
			className = className.replace(/\./g, '_');
			html.className = className; 
		},
		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",
				versionSearch: "Version"
			},{
				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: "IE",
				versionSearch: "MSIE"
			},{
				string: navigator.userAgent,
				subString: "Gecko",
				identity: "Mozilla",
				versionSearch: "rv"
			},{ 		// for older Netscapes (4-)
				string: navigator.userAgent,
				subString: "Mozilla",
				identity: "Netscape",
				versionSearch: "Mozilla"
			}
		],
		dataEngine : [{
				string: navigator.userAgent,
				subString: "AppleWebKit",
				identity: "WebKit"
			},{
				string: navigator.userAgent,
				subString: "Gecko",
				identity: "Gecko",
				versionSearch: "rv"
			},{
				prop: window.opera,
				identity: "Presto"
			},{
				string: navigator.userAgent,
				subString: "Trident",
				identity: "Trident"
			}
		],
		dataOS : [{
				string: navigator.platform,
				subString: "Win",
				identity: "Windows"
			},{
				string: navigator.platform,
				subString: "Mac",
				identity: "Mac"
			},{
				string: navigator.userAgent,
				subString: "iPhone",
				identity: "iOS"
		    },{
				string: navigator.platform,
				subString: "Linux",
				identity: "Linux"
			}
		]	
	};
	BrowserDetect.init();
	window.$.client = {
		os: BrowserDetect.OS,
		browser: BrowserDetect.browser,
		browserVersion: BrowserDetect.browserVersion,
		engine: BrowserDetect.engine,
		engineVersion: BrowserDetect.engineVersion
	};
})();