function geostar(){
//var strStartPLZ  = "06846";
//var strStartName = "Dessau";
//var strStartLand = "DE";
var strStartPLZ  = document.getElementById("StartPLZ").value;
var strStartOrt = document.getElementById("StartOrt").value;

if ((strStartPLZ == "") && (strStartOrt == ""))
	alert("Sie müssen mindestens Postleitzahl oder Ort angeben, sonst ist eine Routenberechnung nicht möglich.");
else
	window.open("http://www.shellgeostar.de/share/iti.asp?ITI_MODE=vehicule&ITI_MODE_OPTION_vehicule=Time&ITI_START_ADDRESS=&ITI_END_ADDRESS=&ITI_START_ZIPCODE=" + strStartPLZ + "&ITI_END_ZIPCODE=07907&ITI_START_COUNTRYCODE=DE&ITI_END_COUNTRYCODE=DE&SEARCH_ITI.x=0&VN=Export&VV=&ITIERRORCITYSTART=&ITIERRORCITYEND=&ITI_START_CITYNAME=" + strStartOrt + "&ITI_END_CITYNAME=Sch%F6ndorf","_blank");
}