function makeHttpRequest(url, callback_function, return_xml) {
	   var http_request = false;

	   if (window.XMLHttpRequest) { // Mozilla, Safari,...
	       http_request = new XMLHttpRequest();
	       if (http_request.overrideMimeType) {
	           http_request.overrideMimeType('text/xml','charset=ISO-8859-1');
	       }
	   } else if (window.ActiveXObject) { // IE
	       try {
	           http_request = new ActiveXObject("Msxml2.XMLHTTP");
	       } catch (e) {
	           try {
	               http_request = new ActiveXObject("Microsoft.XMLHTTP");
	           } catch (e) {}
	       }
	   }

	   if (!http_request) {
	       alert('Leider unterstützt Ihr Browser diese Funktion nicht.\nBittte benutzen Sie den Safari Browser, sollten Sie mit Einem Mac arbeiten.');
	       return false;
	   }
	   http_request.onreadystatechange = function() {
	       if (http_request.readyState == 4) {
	           if (http_request.status == 200) {
	               if (return_xml) {
	                   eval(callback_function + '(http_request.responseXML)');
	               } else {
	                   eval(callback_function + '(http_request.responseText)');
	               }
	           } else {
	               alert('There was a problem with the request.(Code: ' + http_request.status + ')');
	           }
	       }
	   }
	   http_request.open('GET', url, true);
	   http_request.send(null);
	}
	
function makeHttpRequest2(url, callback_function, para, return_xml) {
	   var http_request = false;

	   if (window.XMLHttpRequest) { // Mozilla, Safari,...
	       http_request = new XMLHttpRequest();
	       if (http_request.overrideMimeType) {
//	           http_request.overrideMimeType('text/xml');
http_request.overrideMimeType('text/xml; charset=ISO-8859-1'); 
	       }
	   } else if (window.ActiveXObject) { // IE
	       try {
	           http_request = new ActiveXObject("Msxml2.XMLHTTP");
	       } catch (e) {
	           try {
	               http_request = new ActiveXObject("Microsoft.XMLHTTP");
	           } catch (e) {}
	       }
	   }

	   if (!http_request) {
	       alert('Leider unterstützt Ihr Browser diese Funktion nicht.\nBittte benutzen Sie den Safari Browser, sollten Sie mit Einem Mac arbeiten.');
	       return false;
	   }
	   http_request.onreadystatechange = function() {
	       if (http_request.readyState == 4) {
	           if (http_request.status == 200) {
	               if (return_xml) {
	                   eval(callback_function + '(http_request.responseXML)');
	               } else {
	                   eval(callback_function + '(http_request.responseText,para)');
	               }
	           } else {
	               alert('There was a problem with the request.(Code: ' + http_request.status + ')');
	           }
	       }
	   }
	   http_request.open('GET', url, true);
	   http_request.send(null);
	}