function vcheck() {
	var version = "V07100109";
	var vcok = "No Updates available for IGC Flight Replay";
	var vcnok = "V0.7 Build 09.01.2010 available. New: American Units. Visit <a href='http://ywtw.de/igcsim.html'> http://ywtw.de/igcsim.html</a>";
	var parms = window.location.search.substring(1,window.location.search.length);
	var div = document.getElementById("vcheckdiv")
	if ( div == null ) return "NOK";
	if (parms.indexOf(version) > 0)
		div.innerHTML = vcok;
	else
		div.innerHTML = vcnok;
	return "OK";
}