function browserAbfrage()
{  if ( ( navigator.appName == "Netscape") && ( parseInt( navigator.appVersion ) > 3 ) )
		if ( parseInt( navigator.appVersion ) < 5 )
      {	//isNav = true;
			flugWeg = "hide";
         unsichtbar = "hide";
         sichtbar = "show"
		}
      else
      {  //isNav5 = true;
			flugWeg = "hidden";
	      unsichtbar = "hidden";
	      sichtbar = "visible";
      }
	if ( (navigator.appName == "Microsoft Internet Explorer")
		&& ( parseInt(navigator.appVersion) > 3) )
	{	//isIE = true;
		flugWeg = "hidden";
      unsichtbar = "hidden";
      sichtbar = "visible";
	}
	//return isIE || isNav || isNav5;
}