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: "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.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{
			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.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
  var oBrowserSupport = {
   getWarning: function()
   {
    BrowserDetect.init();
    var sWarning = '';
    oSupport = oBrowserSupport[BrowserDetect.browser];
    
    if (typeof oSupport == 'undefined' || oSupport === null || oSupport === '')
    {
     sWarning = 'is untested for this site - if you have problems please use the \'Contact Us\' page to inform us';
    }
    else if (oSupport === false)
    {
     sWarning = 'does not work correctly on this site. We recommend using an alternative browser.';
    }
    else if (oSupport.iMinVersion && BrowserDetect.version < oSupport.iMinVersion)
    {
     if (oSupport.iMinTested && BrowserDetect.version < oSupport.iMinTested)
     {
      sWarning = 'is untested for this site - if you have problems please use the \'Contact Us\' page to inform us. ';
     }
     else
     {
      sWarning = 'does not work correctly on this site. ';
     }
     sWarning = sWarning + 'We recommend upgradeing to the latest Version (at least '+oSupport.iMinVersion+') or using an alternative browser.';
    }
    if (sWarning)
    {
     sWarning = 'Warning: Your browser ('+BrowserDetect.browser+' V'+BrowserDetect.version+') '+ sWarning +' We apologise for any inconvenience this causes';
    }
    return sWarning;
   }
  };