// JavaScript Document
// Autor: Thiago Prado 
// Data: 17/05/2004
function browser () {
      var b = navigator.appName;
      var v = this.version = navigator.appVersion;
      var ua = navigator.userAgent.toLowerCase();
      this.v = parseInt(v);
      this.safari = ua.indexOf("safari")>-1; // always check for safari & opera 
      this.opera = ua.indexOf("opera")>-1; // before ns or ie
      this.ns = !this.opera && !this.safari && (b=="Netscape");
      this.ie = !this.opera && (b=="Microsoft Internet Explorer");
      this.gecko = ua.indexOf('gecko')>-1; // check for gecko engine
      if (this.ns) {
              this.ns4 = (this.v==4);
              this.ns6 = (this.v>=5); 
              this.b = "Netscape";
      }else if (this.ie) {
              this.ie4 = this.ie5 = this.ie55 = this.ie6 = false;
              if (v.indexOf('MSIE 4')>0) {this.ie4 = true; this.v = 4;}
              else if (v.indexOf('MSIE 5')>0) {this.ie5 = true; this.v = 5;}
              else if (v.indexOf('MSIE 5.5')>0) {this.ie55 = true; this.v = 5.5;}
              else if (v.indexOf('MSIE 6')>0) {this.ie6 = true; this.v = 6;}
              this.b = "MSIE";
      }else if (this.opera) {
              this.v=parseInt(ua.substr(ua.indexOf("opera")+6,1)); // set opera version
              this.opera6=(this.v>=6);
              this.opera7=(this.v>=7);
              this.b = "Opera";
      }else if (this.safari) {
              this.ns6 = (this.v>=5); // ns6 compatible correct?
              this.b = "Safari";
      }
      this.dom = (document.createElement && document.appendChild && document.getElementsByTagName)? true : false;
      this.def = (this.ie||this.dom);
      this.win32 = ua.indexOf("win")>-1;
      this.mac = ua.indexOf("mac")>-1;
      this.other = (!this.win32 && !this.mac);
      this.supported = (this.def||this.ns4||this.ns6||this.opera)? true:false;
};