// =========================================================================
// BROWSER DETECT - CHANGE LOG (most recent first)
// =========================================================================
//
// -------------------------------------------------------------------------
//
// 13 Aug 2009.	 Added custom rule to pick up IE8 (regardless of whether
//		 browser is in IE7 compatibility mode).
// 16 Dec 2008.	 Added data to pick up Google Chrome. This script now sets
//		 variable BD_supported_browser, that can be used in other
//		 scripts.
// 03 Oct 2007.  Added data to pick up NS6.2 (previously 'unknown').
// 19 Sep 2007.  First versioned version.
//
// -------------------------------------------------------------------------

BD_script_loaded = 1;

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";
		
		// Report IE8 version number as '8' even if in IE7 compatibility mode
		// See: http://blogs.msdn.com/giorgio/archive/2009/04/14/how-to-detect-ie8-using-javascript-client-side.aspx
		// Above link notes Trident version is likely to increase in future, meaning possibly ahead of IE9 (?)
		// Below will therefore need adjusting with relevant Trident version to pick up IE9 when it's released.
		if ( this.browser == 'Explorer' && this.version >= 7 ) {
			var trident_v = -1;
			var re = new RegExp("Trident\/([0-9]{1,}[\.0-9]{0,})");
			if (re.exec(navigator.userAgent) != null) {
				trident_v = parseFloat(RegExp.$1)
			}  
			if ( trident_v >= 4 ) { // see above, may increase ahead of IE9, so don't test equality.
				this.version = 8;
			}
		}
		
		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: "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"
		},

		{	// 03/10/2007 ADDED TO CATCH NS6.2
			string: navigator.userAgent,
			versionSearch: "Netscape6",
			subString: "Netscape6",
			identity: "Netscape"
		},

		{	// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{
			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.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};

BrowserDetect.init(); // run this immediately

// ---------------------------------------------------------------------------------
// Check if user's browser is 'supported' - i.e. tested, and will run our scripts OK
// Note: individual scripts may reduce the list further, e.g. to exclude IE5 Mac
// ---------------------------------------------------------------------------------

var BD_supported_browser = 0;

if ( BrowserDetect.OS == 'Windows' ) {
	if ( 
		   ( BrowserDetect.browser == 'Explorer' && BrowserDetect.version >= 5 )
		|| ( BrowserDetect.browser == 'Firefox'  && BrowserDetect.version >= 1 )
		|| ( BrowserDetect.browser == 'Netscape' && BrowserDetect.version >= 7 )
		|| ( BrowserDetect.browser == 'Opera' 	 && BrowserDetect.version >= 8 )
		|| ( BrowserDetect.browser == 'Safari' )
		|| ( BrowserDetect.browser == 'Chrome' )
	) {
		BD_supported_browser = 1;
	}
}
else if ( BrowserDetect.OS == 'Mac' ) {
	if (
		   ( BrowserDetect.browser == 'Safari'   && BrowserDetect.version >= 410 )
		|| ( BrowserDetect.browser == 'Firefox'  && BrowserDetect.version >= 1   )
		|| ( BrowserDetect.browser == 'Explorer' && BrowserDetect.version >= 5   )
	) {
		BD_supported_browser = 1;
	}
}