function mrCheckBrowser(){
  // Returns true unless browser is Netscape and Version lower than 4.76
  var verStr=navigator.appVersion, app=navigator.appName
  var okay=1; // presumed innocence
  if (app.indexOf('Netscape') != -1){ //
    if(parseFloat(verStr)<5){
      okay=0;
    }
  }
  return (okay==1);
}