// Browser Detection
// N.B. IE8 identifies itself as version 7


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"
              }
       ]

};