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'
	},
	{
		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.platform,
		subString: 'Linux',
		identity: 'Linux'
	}
  ]
};

BrowserDetect.init();