function doIt(url, ziel, cont){
	//erstellen des requests
    var req = null;

    try{
    	req = new XMLHttpRequest();
    }
    catch (ms){
    	try{
        	req = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (nonms){
        	try{
            	req = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch (failed){
            	req = null;
            }
        }  
    }

    if (req == null) alert("Error creating request object!");
                  
    //anfrage erstellen (GET, url ist localhost,
    //request ist asynchron      
    req.open("GET", url, true);

    //Beim abschliessen des request wird diese Funktion ausgeführt
    req.onreadystatechange = function(){            
        switch(req.readyState) {
            case 4:
            	if(req.status!=200) {
                	alert("Fehler:"+req.status); 
                }else{    
                                
                    //schreibe die antwort in den div container mit der id content 
                    document.getElementById(ziel).innerHTML = req.responseText;
                }
            break;
                    
            default:
                return false;
            break;     
        }
    };
  
  	req.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
    req.send(null);				
	
	if (cont=='1') setTimeout("doIt('"+url+"', '"+ziel+"', '"+cont+"')",60000);
}