function Leutwyler_checkBrowser(NSvers,NSpass,NSnoPass,IEvers,IEpass,IEnoPass,OBpass,URL,altURL)
 { 
	  var newURL='', verStr=navigator.appVersion, app=navigator.appName, version = parseFloat(verStr);
	  if (app.indexOf('Netscape') != -1)
	 {
	  if (version >= NSvers) {if (NSpass>0) newURL=(NSpass==1)?URL:altURL;
	 }
	 else {if (NSnoPass>0) newURL=(NSnoPass==1)?URL:altURL;}
	} 
	  else if (app.indexOf('Microsoft') != -1)
	 {
	 if (version >= IEvers || verStr.indexOf(IEvers) != -1)
	 {
	if (IEpass>0) newURL=(IEpass==1)?URL:altURL;
	}
    else {if (IEnoPass>0) newURL=(IEnoPass==1)?URL:altURL;}
	}
	else if (OBpass>0) newURL=(OBpass==1)?URL:altURL;
	if (newURL) { window.location=unescape(newURL); document.Leutwyler_returnValue=false; }
}