function ajax_get(query_url, target, function_name) {
  var  http_request;
     try {
     http_request = new XMLHttpRequest();
  } catch (e) {
        try {
          http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (eror) {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
  	if( function_name == null) {
  		function_name = null
  	}
  	
	http_request.open("GET", query_url);
	http_request.onreadystatechange = function() { iIncomingData(http_request,target,function_name); };
	http_request.send(null);
}

function ajax_set(query_url) {
    var  http_request;
        try {
        http_request = new XMLHttpRequest();
    } catch (e) {
        try {
          http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (eror) {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
	http_request.open("GET", query_url);
	http_request.send(null);
}

function iIncomingData(http_request,target,function_name) {
	if (http_request.readyState == 4 && http_request.status == 200) {
		var  elem = document.getElementById(target);
		elem.innerHTML = http_request.responseText;
		if(function_name != null) {
			var test =function_name;
			test();
		}
	}
}
function pdf_request(url,dokument_url) {
	 var  http_request;
        try {
        http_request = new XMLHttpRequest();
    } catch (e) {
        try {
          http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (eror) {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
	http_request.open("GET", url);
	http_request.onreadystatechange = function() { pdf_request_handler(http_request,dokument_url); };
	http_request.send(null);
}
function pdf_request_handler(http_request,dokument_url) {
	if (http_request.readyState == 4 && http_request.status == 200) {
		var  elem = document.getElementById('msg_box');
		if (http_request.responseText.indexOf('DONE')!=-1) {
			self.location=dokument_url;
			elem.innerHTML = 'PDF wurde erfoglreich erstellt und wird nun geöffnet !';
			elem.className = 'success';
		}else {
			elem.innerHTML = http_request.responseText;
			elem.className = 'errors';
		}
	}	
}