function submitRegionChange(aRegionID, aGemeindeID) {
		var aRegionInput = document.getElementById("hwsearch_RegionID");
		var aGemeindeInput = document.getElementById("hwsearch_GemeindeID");
		var aSearchForm = document.getElementById("SearchForm");
		
		if (aRegionInput != null)
			aRegionInput.value=(aRegionID==null)?"":aRegionID;
		
		if (aGemeindeInput != null) 
			aGemeindeInput.value=(aGemeindeID==null)?"":aGemeindeID;
		
		if (aSearchForm != null)
			document.SearchForm.submit();
	}