var anfrage = null;
   function erzeugeAnfrage() {
     try {
       anfrage = new XMLHttpRequest();
     } catch (versuchmicrosoft) {
       try {
         anfrage = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (anderesmicrosoft) {
         try {
           anfrage = new ActiveXObject("Microsoft.XMLHTTP");
         } catch (fehlschlag) {
           anfrage = null;
         }
       }
     }

     if (anfrage == null)
       alert("Fehler beim Erzeugen des Anfrage-Objekts!");
   }

   function getPages(selectObj) {
   
 	   
   if(selectObj.nextSibling) {
    if(selectObj.nextSibling.options){
     selectObj.nextSibling.options.length = 0;
   var todel = selectObj.nextSibling;
       selectObj.parentNode.removeChild(todel);
     }
   }
  
     erzeugeAnfrage();
     var url = "index.php?eID=nodropdownmenu";
     var selectId = selectObj.getAttribute('id');
     var ident = selectObj.getAttribute('name');
     var pid1 = document.getElementById(selectId).value; 
     var counter = selectId.substring(selectId.length -1, selectId.length);   
    
   
    url = url + "&pid=" + pid1 + "&co=" + counter + "&ident=" +ident ;
      	
     
     anfrage.open("GET", url, true);
     anfrage.onreadystatechange = updateSeite;
     anfrage.send(null);
  }

  function updateSeite() {
    if (anfrage.readyState == 4) {
  
    var update = new Array();
    var response = anfrage.responseText;
    
    // response = top2 || <select>...
    // response wird in array aufgeteilt
    // schreibe in div "dropdown-top2" (update[0]) den inhalt des 2ten array elements 
    if(response.indexOf('||' != -1)) {
    	 update = response.split('||');
			if(update[0] =='redirect'){
				window.location.href = update[1];
			}
    	  	if(document.getElementById('dropdown-' + update[0] + update[1])){
    	  	
					for(var i=parseInt(update[1]) +1; i<6; i++) {
					
						if(document.getElementById('dropdown-' + update[0] + i)){
							document.getElementById('dropdown-' + update[0] + i).innerHTML ='';
						}	
					}
				
		        document.getElementById('dropdown-' + update[0]+ update[1]).innerHTML = update[2];
			}
      }
    }
  }