var DHTML = false, DOM = false, MSIE4 = false, NS4 = false, OP = false;

if (document.getElementById) {
  DHTML = true;
  DOM = true;
} else {
  if (document.all) {
    DHTML = true;
    MSIE4 = true;
  } else {
    if (document.layers) {
      DHTML = true;
      NS4 = true;
    }
  }
}
if (window.opera) {
  OP = true;
}
//alert("DHTML - "+DHTML+" / DOM - "+DOM+" / MSIE4 - "+MSIE4+" / NS4 - "+NS4+" / OP - "+OP);


   function treeMenu_init(menu, data) {
    var array = new Array(0);
    if(data != null && data != "") {
      array = data.match(/\d+/g);
    }
    var items = menu.getElementsByTagName("li");
    for(var i = 0; i < items.length; i++) {
      items[i].onclick = treeMenu_handleClick;
      if(!treeMenu_contains(treeMenu_getClasses(items[i]), "treeMenu_opened")
          && items[i].getElementsByTagName("ul").length
            + items[i].getElementsByTagName("ol").length > 0) {
        var classes = treeMenu_getClasses(items[i]);
        if(array.length > 0 && array[0] == i) {
          classes.push("treeMenu_opened")
        }
        else {
          classes.push("treeMenu_closed")
        }
        items[i].className = classes.join(" ");
      }
      if(array.length > 0 && array[0] == i) {
        array.shift();
      }
      helpoff()
    }
  }


 function treeMenu_handleClick(event) {
    if(event == null) { //Workaround für die fehlenden DOM Eigenschaften im IE
      event = window.event;
      event.currentTarget = event.srcElement;
      while(event.currentTarget.nodeName.toLowerCase() != "li") {
        event.currentTarget = event.currentTarget.parentNode;
      }
      event.cancelBubble = true;
    }
    else {
      event.stopPropagation();
    }
    var array = treeMenu_getClasses(event.currentTarget);
    for(var i = 0; i < array.length; i++) {
      if(array[i] == "treeMenu_closed") {
        array[i] = "treeMenu_opened";
      }
      else if(array[i] == "treeMenu_opened") {
        array[i] = "treeMenu_closed"
      }
    }
    // alert(document.getElementById("infosegment").hit);
    event.currentTarget.className = array.join(" ");
	}


  function treeMenu_getClasses(element) {
    if(element.className) {
      return element.className.match(/[^ \t\n\r]+/g);
    }
    else {
      return new Array(0);
    }
  }

   function treeMenu_contains(array, element) {
    for(var i = 0; i < array.length; i++) {
      if(array[i] == element) {
        return true;
      }
    }
    return false;
  }

  function treeMenu_store(menu) {
    var result = new Array();
    var items = menu.getElementsByTagName("li");
    for(var i = 0; i < items.length; i++) {
      if(treeMenu_contains(treeMenu_getClasses(items[i]), "treeMenu_opened")) {
        result.push(i);
      }
    }
    return result.join(" ");
  }

  function helpon()  {
	top.document.getElementById("hilfetxt").style.visibility = "visible";
  }

  function helpoff()  {
	top.document.getElementById("hilfetxt").style.visibility = "hidden";
  }