function handleZipField(field) {
	if (field.value.length==zipLength && !isNaN(field.value))  {
		//alert("HANDLE ZIP AJAX");
		xajax_getZip(field.value,1); 
	}
	else {
		document.getElementById('gemeindeauswahl').style.visibility='hidden';
		document.getElementById('eingabe_gemeinde').style.visibility='hidden';
		if(document.getElementById('svu_local_text'))
			document.getElementById('svu_local_text').style.visibility='hidden';
		if(document.getElementById('evu_lokal'))
			document.getElementById('evu_lokal').style.visibility='hidden';
		document.getElementById("eingabe_gemeinde").options.length = 0;
		if(document.getElementById("evu_lokal"))
			document.getElementById("evu_lokal").options.length = 0;
	}
}