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",
    versionSearch: "Version"
  },
  {
    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.userAgent,
    subString: "iPhone",
    identity: "iPhone/iPod"
  },
  {
    string: navigator.platform,
    subString: "Linux",
    identity: "Linux"
  }
  ]

};
BrowserDetect.init();