//Container einblenden
 function DivEinblenden(VariablenName) {
 //alert(document.getElementById(VariablenName).style.display);

  if(document.getElementById(VariablenName).style.display == 'block') {
   document.getElementById(VariablenName).style.display = 'none';
  } else {
   document.getElementById(VariablenName).style.display = 'block';
  }
}
function einblenden_ohne_zurueck(VariablenName) {
  if(document.getElementById(VariablenName).style.display == 'none') {
   document.getElementById(VariablenName).style.display = 'block';
  } else {
   document.getElementById(VariablenName).style.display = 'block';
  }
}
//Container ausblenden
 function DivAusblenden(VariablenName) {
  if(document.getElementById(VariablenName).style.display == 'block') {
   document.getElementById(VariablenName).style.display = 'none';
  }
 }

//Zeichen zaehlen
 function textCounter(field, countfield, maxlimit) {
  if (field.value.length > maxlimit){
   field.value = field.value.substring(0, maxlimit);
  } else {
   countfield.value = maxlimit - field.value.length;
  }
 }

//AJAX dropdown
function createXMLHttpRequest() {

var ua;

if(window.XMLHttpRequest) {
    try {
      ua = new XMLHttpRequest();
    } catch(e) {
      ua = false;
    }
  } else if(window.ActiveXObject) {
    try {
      ua = new ActiveXObject("Microsoft.XMLHTTP");
    } catch(e) {
      ua = false;
    }
  }
  return ua;
}

var req = null;

function sendRequest() {
        try {
                req = window.XMLHttpRequest?new XMLHttpRequest():
                new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {
                //Kein AJAX Support
        }
        req.onreadystatechange = handleResponse;
        var id = document.getElementById('dropdown').value;
        req.open('post', 'func.php');
        req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        req.send('s='+ id + '&anti_cache=' + Math.random());
        //einblenden_ohne_zurueck('subcats');
        einblenden_ohne_zurueck('subcatslabel');
}

function handleResponse() {
        if ((req.readyState == 4) && (req.status == 200)) {
                document.getElementById('subcats').innerHTML = req.responseText;
        }
}