var browser = {
  set: {
    
    "google_chrome": {
      name: "Google Chrome",
      match: /Chrome\/(1?[0-9])?\..*? Safari/,
      instruction: "google_chrome",
      releases: {
        "1": {date: "released September 2008 ", version: "1", notes: ''},
        "2": {date: "released May 2009 ", version: "2", notes: ''},
        "3": {date: "released September 2009 ", version: "3", notes: ''},
        "4": {date: "released January 2010 ", version: "4", notes: ''},
        "6": {date: "released May 2010 ", version: "6", notes: ''},
        "5": {date: "released May 2010 ", version: "5", notes: ''},
        "6": {date: "released September 2010 ", version: "6", notes: ''},
        "6": {date: "released September 2010 ", version: "6", notes: ''},
        "7": {date: "released September 2010 ", version: "7", notes: ''},
        "8": {date: "released October 2010 ", version: "8", notes: ''},
        "9": {date: "released October 2010 ", version: "9", notes: ''},
        "11": {date: "released February 2011 ", version: "11", notes: ''},
        "10": {date: "released January 2011 ", version: "10", notes: ''},
        "12": {date: "released March 2011 ", version: "12", notes: ''},
        "13": {date: "released April 2011 ", version: "13", notes: ''},
        "14": {date: "released September 2011 ", version: "14", notes: ''},
        "15": {date: "released October 2011 ", version: "15", notes: ''},
        "16": {date: "released December 2011 ", version: "16", notes: ''},
        "17": {date: "released February 2012 ", version: "17", notes: ''}
      }
    },
    
    "internet_explorer_8": {
      name: "Internet Explorer",
      match: /MSIE ([8-9])\..*;|MSIE ([7])\.[0-9.]*;.*Trident.*/,
      instruction: "internet_explorer_8",
      releases: {
        "8": {date: "released March 2009 ", version: "8", notes: ''},
        "9": {date: "released March 2011 ", version: "9", notes: ''}
      }
    },
    
    "internet_explorer_7": {
      name: "Internet Explorer",
      match: /MSIE ([7])\..*;/,
      instruction: "internet_explorer_7",
      releases: {
        "7": {date: "released October 2006 ", version: "7", notes: ''}
      }
    },
    
    "internet_explorer_legacy": {
      name: "Internet Explorer",
      match: /MSIE ([0-6])\..*;/,
      instruction: "internet_explorer_legacy",
      releases: {
        "6": {date: "released August 2001 ", version: "6", notes: ''},
        "5": {date: "released March 1999 ", version: "5", notes: ''}
      }
    },
    
    "firefox": {
      name: "Firefox",
      match: /Firefox\/([1-9](?:\.[0-9])?).*/,
      instruction: "firefox",
      releases: {
        "1.0": {date: "released November 2004 ", version: "1", notes: ''},
        "2.0": {date: "released October 2006 ", version: "2", notes: ''},
        "3.0": {date: "released June 2008 ", version: "3", notes: ''},
        "3.5": {date: "released July 2009 ", version: "3.5", notes: ''},
        "3.6": {date: "released January 2010 ", version: "3.6", notes: ''},
        "4.0": {date: "released January 2011 ", version: "4", notes: ''},
        "5.0": {date: "released June 2011 ", version: "5", notes: ''},
        "6.0": {date: "released August 2011 ", version: "6", notes: ''},
        "7.0": {date: "released September 2011 ", version: "7", notes: ''},
        "8.0": {date: "released November 2011 ", version: "8", notes: ''},
        "9.0": {date: "released December 2011 ", version: "9", notes: ''}
      }
    },
    
    "opera_legacy": {
      name: "Opera",
      match: /Opera\/([0-8][0-9]?)\..*?|Opera\/([0-9])\.[0-7].*?/,
      instruction: "opera_legacy",
      releases: {
        "9": {date: "released June 2006 ", version: "9", notes: ''},
        "7": {date: "released January 2003 ", version: "7", notes: ''},
        "6": {date: "released December 2001 ", version: "6", notes: ''},
        "8": {date: "released April 2005 ", version: "8", notes: ''},
        "9.51": {date: "", version: "9.51", notes: ''},
        "9.52": {date: "", version: "9.52", notes: ''},
        "9.60": {date: "", version: "9.6", notes: ''},
        "9.80": {date: "", version: "9.80", notes: ''}
      }
    },
    
    "safari": {
      name: "Safari",
      match: /Version\/([0-9])\..*? Safari/,
      instruction: "safari",
      releases: {
        "3": {date: "released June 2007 ", version: "3", notes: ''},
        "4": {date: "released June 2009 ", version: "4", notes: ''},
        "5": {date: "released June 2010 ", version: "5", notes: ''}
      }
    },
    
    "safari_legacy": {
      name: "Safari",
      match: /Safari\/([34]1)/,
      instruction: "safari_legacy",
      releases: {
        "41": {date: "released April 2005 ", version: "2", notes: ''},
        "31": {date: "released June 2003 ", version: "1", notes: ''}
      }
    },
    
    "opera": {
      name: "Opera",
      match: /Opera\/[0-9]{1,2}\..*?Version\/([0-9]{1,2}\.[0-9]{1,2}).*?/,
      instruction: "opera",
      releases: {
        "10.51": {date: "released March 2010 ", version: "10.51", notes: ''},
        "10.10": {date: "released November 2009 ", version: "10.10", notes: ''},
        "10.60": {date: "released June 2010 ", version: "10.6", notes: ''},
        "10.52": {date: "released April 2010 ", version: "10.52", notes: ''},
        "10.00": {date: "released September 2009 ", version: "10.00", notes: ''},
        "10.50": {date: "released March 2010 ", version: "10.50", notes: ''},
        "10.53": {date: "released April 2010 ", version: "10.53", notes: ''},
        "10.60": {date: "released June 2010 ", version: "10.6", notes: ''},
        "10.63": {date: "released October 2010 ", version: "10.63", notes: ''},
        "11": {date: "released October 2010 ", version: "11", notes: ''},
        "9.8": {date: "", version: "9.8", notes: ''},
        "9.51": {date: "released July 2008 ", version: "9.51", notes: ''},
        "9.60": {date: "released October 2008 ", version: "9.60", notes: ''},
        "11.01": {date: "released January 2011 ", version: "11", notes: ''},
        "11.10": {date: "released April 2011 ", version: "11.10", notes: ''},
        "11.50": {date: "released June 2011 ", version: "11.50", notes: ''},
        "11.60": {date: "released December 2011 ", version: "11.60", notes: ''}
      }
    }
    
  },

  platform: navigator.userAgent.match(/Macintosh/) ? 'Mac' : 'PC',
  possibilities: [
    'google_chrome',
    'internet_explorer_8',
    'internet_explorer_7',
    'internet_explorer_legacy',
    'firefox',
    'opera_legacy',
    'safari',
    'safari_legacy',
    'opera'
  ],

  detect: function() {
    var len = this.possibilities.length;
    for (i = 0; i < len; i++) {
      var k = this.possibilities[i];
      if (this.set.hasOwnProperty(k) && (this.set[k].version = navigator.userAgent.match(this.set[k].match))) {
        var matching = this.set[k];

        // hack for ie8 ACTING LIKE ie7
        if (k == 'internet_explorer_8' && !matching.version[1]) {
          matching.version[1] = '8';
        }
        if (!matching.releases[matching.version[1]]){
            return null;
        }
  	    release = matching.releases[matching.version[1]];
	    matching.version = ['', release.version];
  	    matching.releaseDate = release.date;
          matching.notes = release.notes;

	    return matching;
      }
    }
    return null;
  },
  
  error_message: function(){
      if ('None'!='None'){
          return 'None';
      } else if ('None'!='None') {
          return 'None';
      } else{
          return "Sorry, we couldn’t recognize your browser. The What Browser team has been notified.";
      };
  }
};