var xmlHttp = null;
var wert_global = "";
function getbankname(wert) {
  wert_global = wert;
  document.kontodaten.blz.focus();
  if (window.ActiveXObject) {
    try {
      xmlHttp= new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
      try {
        xmlHttp= new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {
      }
    }
  } else if (window.XMLHttpRequest) {
    try {
      xmlHttp= new XMLHttpRequest();
    } catch (e) {
    }
  }

  if (xmlHttp) {
    xmlHttp.open('GET', 'scripts/ajax/bank.php?blz=' + wert, true);
    xmlHttp.onreadystatechange = daten;
    xmlHttp.send(null);
  }
}

var text = '';
function daten() {
    if (xmlHttp.readyState == 4) {
    document.kontodaten.bank.value = xmlHttp.responseText;
    } 
}