/*

    Detects a user's browser, version and os.
    
    To use:
        Browser name:       .browser 
        Browser version:    .version 
        OS name:            .OS 
*/
function CliBrowserDetect() {
    
    var _browser;
    var _version;
    var _os; 
    
    CliBrowserDetect.prototype.Browser = function() { return _browser;}
    CliBrowserDetect.prototype.Version = function() { return _version;}
    CliBrowserDetect.prototype.OS = function() { return _os;}
    
    function init() { 
		_browser = searchString(_dataBrowser) || "An unknown browser";
		_version = searchVersion(navigator.userAgent)
			|| searchVersion(navigator.appVersion)
			|| "an unknown version";
		_os = searchString(_dataOS) || "an unknown OS";
	}
	
	function searchString (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			_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;
		}
	}
	
	function searchVersion (dataString) {
		var index = dataString.indexOf(_versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+_versionSearchString.length+1));
	}
	
	var _versionSearchString;
	var _dataBrowser = [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			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"
		}
	]
	
	var _dataOS = [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]
	
    // invoke the instructor
    init();
}