var reKonto = /^\s*\d{2}\s*\d{4}\s*\d{4}\s*\d{4}\s*\d{4}\s*\d{4}\s*\d{4}\s*$/
var reData = /^\s*\d{2}-\d{2}-\d{4}\s*$/
function isEmpty(s) {return ((s == null) || (s.length == 0))}
function isKonto(s) {return reKonto.test(s);}
function isData(s) {return reData.test(s);}